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  • 1
    Online Resource
    Online Resource
    MPSA abstracts
    Springer Science and Business Media LLC ; 1994
    In:  Journal of Protein Chemistry Vol. 13, No. 5 ( 1994-07), p. 515-543
    Details
    In: Journal of Protein Chemistry, Springer Science and Business Media LLC, Vol. 13, No. 5 ( 1994-07), p. 515-543
    Type of Medium: Online Resource
    ISSN: 0277-8033 , 1573-4943
    URL: Article
    DOI: 10.1007/BF01898856
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 1994
    detail.hit.zdb_id: 2017225-4
    detail.hit.zdb_id: 2143071-8
    SSG: 12
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  • 2
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    Daily carbon, nitrogen and phosphorus budgets for the Mediterranean planktivorous damselfish Chromis chromis
    Elsevier BV ; 2007
    In:  Journal of Experimental Marine Biology and Ecology Vol. 352, No. 2 ( 2007-12), p. 378-391
    Details
    In: Journal of Experimental Marine Biology and Ecology, Elsevier BV, Vol. 352, No. 2 ( 2007-12), p. 378-391
    Type of Medium: Online Resource
    ISSN: 0022-0981
    URL: Article
    DOI: 10.1016/j.jembe.2007.08.016
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2007
    detail.hit.zdb_id: 410283-6
    detail.hit.zdb_id: 1483103-X
    SSG: 12
    SSG: 7,20
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  • 3
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    Radular teeth as models for the improvement of industrial cutting devices
    Elsevier BV ; 1999
    In:  Materials Science and Engineering: C Vol. 7, No. 2 ( 1999-12), p. 129-142
    Details
    In: Materials Science and Engineering: C, Elsevier BV, Vol. 7, No. 2 ( 1999-12), p. 129-142
    Type of Medium: Online Resource
    ISSN: 0928-4931
    URL: Article
    DOI: 10.1016/S0928-4931(99)00129-0
    Language: English
    Publisher: Elsevier BV
    Publication Date: 1999
    detail.hit.zdb_id: 2012160-X
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  • 4
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    Reading the copepod personal ads: increasing encounter probability with hydromechanical signals
    The Royal Society ; 1998
    In:  Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences Vol. 353, No. 1369 ( 1998-05-29), p. 691-700
    Details
    In: Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, The Royal Society, Vol. 353, No. 1369 ( 1998-05-29), p. 691-700
    Abstract: Females of the calanoid copepod Temora longicornis react to chemical exudates of male conspecifics with little hops, quite distinct from their normal smooth uniform swimming motion. These hops possibly serve to create a hydrodynamical signal in the surrounding water, to increase encounter probability with potential mates. Laser sheet particle image velocimetry was used to investigate the flow fields associated with these hops and to compare them to the flow of the feeding current of an adult female. During, and immediately after a hop, the flow field around the copepod showed a marked difference from that of a foraging animal. During foraging, the highest velocity gradients were located around the feeding appendages of the copepod. During a hop, high velocity gradients are located behind the animal. About 0.5 seconds after the start of swimming leg movement, effects of the hop had virtually dissipated and the flow field resembled that around a foraging animal. The estimated volume of influence (i.e. the volume around the copepod where the animal has a significant influence on the water) increased about 12–fold during the hop compared with the situation around a foraging animal. Furthermore, the rate of viscous energy dissipation within the copepods' volume of influence increased nearly 80–fold. Hops may serve to increase encounter probability, but due to the short duration of the effect and the high energetic costs they would only be adaptive when other cues have indicated that suitable sexual partners are in the vicinity.
    Type of Medium: Online Resource
    ISSN: 0962-8436 , 1471-2970
    URL: Article
    DOI: 10.1098/rstb.1998.0235
    RVK:
    WA 15000
    Language: English
    Publisher: The Royal Society
    Publication Date: 1998
    detail.hit.zdb_id: 1462620-2
    SSG: 12
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  • 5
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    Online Resource
    The social and mating system of the herbivorous reef fishSparisoma viride: one-male versus multi-male groups
    Springer Science and Business Media LLC ; 1996
    In:  Environmental Biology of Fishes Vol. 47, No. 4 ( 1996-12), p. 353-378
    Details
    In: Environmental Biology of Fishes, Springer Science and Business Media LLC, Vol. 47, No. 4 ( 1996-12), p. 353-378
    Type of Medium: Online Resource
    ISSN: 0378-1909 , 1573-5133
    URL: Article
    DOI: 10.1007/BF00005050
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 1996
    detail.hit.zdb_id: 196790-3
    detail.hit.zdb_id: 1497685-7
    SSG: 21,3
    SSG: 12
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  • 6
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    Burrow Ventilation in the Tube-Dwelling Shrimp Callianassa Subterranea (Decapoda: Thalassinidea):I. Morphology and Motion of the Pleopods, Uropods and Telson
    The Company of Biologists ; 1998
    In:  Journal of Experimental Biology Vol. 201, No. 14 ( 1998-07-01), p. 2151-2158
    Details
    In: Journal of Experimental Biology, The Company of Biologists, Vol. 201, No. 14 ( 1998-07-01), p. 2151-2158
    Abstract: The morphology of the pleopods, uropods and telson of the tube-dwelling shrimp Callianassa subterranea have been studied using dissection microscopy and scanning electron microscopy. The kinematics of these appendages were examined by motion analysis of macro-video recordings of ventilating shrimps in transparent artificial burrows. The pleopods show the usual crustacean biramous anatomy, but all segments are rostro-caudally flattened. The protopodite bears a triangular medially oriented endopodite and a scoop-shaped exopodite. The contralateral endopodites are linked by the appendix interna, ensuring a perfect phase relationship between contralateral pleopods. The outer rims of the exopodites are fringed with long fern-leaf-like plumose setae bearing flattened setules. These setae have very mobile joints and can be turned caudally. The slits between contralateral endopodites have rims of leaf-like setae as well. Setae of the same leaf-like type fringe the uropods, but these are non-motile. The telson has a narrow fringe of leaf-like setae, locally interrupted by long mechanoreceptory setae. A shrimp, wandering through the burrow or resting, holds its pleopods against the abdomen with the exopodites and their setal fringes retracted medially. The uropods are folded medially as well, probably to reduce the shrimp’s drag. During ventilation, the uropods are extended against the tube wall, leaving only a small opening for flow ventral from the telson, and the pleopods beat at a frequency of approximately 1 Hz (0.9±0.2 Hz). Fourier analysis of pleopod kinematics showed that the motion pattern of the first flow-generating pleopod pair (PP1) consisted mainly of the first harmonic (75 %) and to a lesser extent of the third harmonic (20 %), resulting in almost perfect sinusoidal motion. The motion patterns of PP2 and PP3 could be modelled by assigning pure sinusoids with a 120 ° phase shift and a rostro-caudal ranking to the three pairs of pleopods.
    Type of Medium: Online Resource
    ISSN: 0022-0949 , 1477-9145
    URL: Article
    DOI: 10.1242/jeb.201.14.2151
    Language: English
    Publisher: The Company of Biologists
    Publication Date: 1998
    detail.hit.zdb_id: 1482461-9
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  • 7
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    Online Resource
    Copepod feeding currents: flow patterns, filtration rates and energetics
    The Company of Biologists ; 2003
    In:  Journal of Experimental Biology Vol. 206, No. 2 ( 2003-01-15), p. 255-267
    Details
    In: Journal of Experimental Biology, The Company of Biologists, Vol. 206, No. 2 ( 2003-01-15), p. 255-267
    Abstract: Particle image velocimetry was used to construct a quasi 3-dimensional image of the flow generated by the feeding appendages of the calanoid copepod Temora longicornis. By scanning layers of flow, detailed information was obtained on flow velocity and velocity gradients. The flow around feeding T. longicornis was laminar, and was symmetrical viewed dorsally, but highly asymmetrical viewed laterally, with high levels of vorticity on the ventral side. The flow rate through the feeding appendages varied between 77 and 220 ml day-1 per individual. The morphology of the flow field ensured that water was entrained over the full length of the first antennae. These were kept out of areas with high velocity gradients that could interfere with distant mechano- or chemoreception. The volume of influence, i.e. the volume of water around the foraging copepod, where shear rates were significantly higher than background levels,was calculated. Implications for encounter probability and mechanoreception are discussed. The average rate of energy dissipation within the copepod's volume of influence is several times higher than the levels of turbulent energy dissipation these animals are likely to encounter in their environment. Even in highly turbulent environments, adult T. longicornis will not experience very significant effects of turbulence. Within the volume of influence of the copepods the energy dissipation due to viscous friction varied between 6.6×10-11 and 2.3×10-10W. Taking mechanical efficiency and muscle efficiency into account, this results in a total energetic cost of the feeding current of 1.6×10-9W per copepod. This value represents only a small percentage of the total energy budget of small calanoid copepods.
    Type of Medium: Online Resource
    ISSN: 1477-9145 , 0022-0949
    URL: Article
    DOI: 10.1242/jeb.00078
    Language: English
    Publisher: The Company of Biologists
    Publication Date: 2003
    detail.hit.zdb_id: 1482461-9
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  • 8
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    Online Resource
    Quantitative Flow Analysis Around Aquatic Animals Using Laser Sheet Particle Image Velocimetry
    The Company of Biologists ; 1995
    In:  Journal of Experimental Biology Vol. 198, No. 2 ( 1995-02-01), p. 283-294
    Details
    In: Journal of Experimental Biology, The Company of Biologists, Vol. 198, No. 2 ( 1995-02-01), p. 283-294
    Abstract: Two alternative particle image velocimetry (PIV) methods have been developed, applying laser light sheet illumination of particle-seeded flows around marine organisms. Successive video images, recorded perpendicular to a light sheet parallel to the main stream, were digitized and processed to map the flow velocity in two-dimensional planes. In particle tracking velocimetry (PTV), displacements of single particles in two subsequent images were determined semi-automatically, resulting in flow diagrams consisting of non-uniformly distributed velocity vectors. Application of grid-cell averaging resulted in flow field diagrams with uniform vector distribution. In sub-image correlation PIV (SCPIV), repetitive convolution filtering of small sub-areas of two subsequent images resulted in automatic determination of cross-correlation peaks, yielding flow field diagrams with regularly spaced velocity vectors. In both PTV and SCPIV, missing values, caused by incomplete particle displacement information in some areas of the images or due to rejection of some erroneous vectors by the vector validation procedure, were interpolated using a two-dimensional spline interpolation technique. The resultant vector flow fields were used to study the spatial distribution of velocity, spatial acceleration, vorticity, strain and shear. These flow fields could also be used to test for flow in the third dimension by studying the divergence, and to detect the presence and location of vortices. The results offer detailed quantitative descriptions of the flow morphology and can be used to assess dissipated energy. The versatile character of the technique makes it applicable to a wide range of fluid mechanical subjects within biological research. So far it has been successfully applied to map the flow around swimming copepods, fish larvae and juvenile fish and the ventilation current of a tube-living shrimp.
    Type of Medium: Online Resource
    ISSN: 0022-0949 , 1477-9145
    URL: Article
    DOI: 10.1242/jeb.198.2.283
    Language: English
    Publisher: The Company of Biologists
    Publication Date: 1995
    detail.hit.zdb_id: 1482461-9
    SSG: 12
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  • 9
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    Online Resource
    Burrow Ventilation in the Tube-Dwelling Shrimp Callianassa Subterranea (Decapoda: Thalassinidea):II. The Flow in the Vicinity of the Shrimp and the Energetic Advantages of a Laminar Non-Pulsating Ventilation Current
    The Company of Biologists ; 1998
    In:  Journal of Experimental Biology Vol. 201, No. 14 ( 1998-07-01), p. 2159-2170
    Details
    In: Journal of Experimental Biology, The Company of Biologists, Vol. 201, No. 14 ( 1998-07-01), p. 2159-2170
    Abstract: The ventilation flow in the vicinity of the pleopod-pumping thalassinid shrimp Callianassa subterranea in an artificial transparent burrow has been mapped using particle image velocimetry. The flow in the tube in front of the shrimp was unidirectional, laminar and steady, with a parabolic cross-sectional velocity profile. The mean flow velocity was 2.0±0.1 mm s−1. The flow passed the thorax of the shrimp along the lateral and ventral sides. Ventral to the abdomen, the flow was dominated by the metachronally oscillating pleopods. The water around a pleopod is accelerated caudally and ventrally during the power stroke, and decelerated to a much lesser extent during the recovery stroke owing to a reduction in pleopod area. On average, the flow ventral to the abdomen converged towards the small opening underneath the telson, simultaneously increasing in velocity. A jet with a core velocity of 18–20 mm s−1 entered the area behind the shrimp from underneath the telson. This caused a separation zone with backflow caudal to the telson. Owing to the high rates of shear, the jet diverged and re-adjusted to a parabolic cross-sectional profile within 1–2 body lengths behind the shrimp, showing no traces of pulsation. The metachronal pleopod movements in combination with the increase in flow velocity at the constriction in the tube caused by the uropods and the telson probably prevented pulsation. The energetic consequences of pulsating and steady flows in combination with several tube configurations were evaluated. The results suggested that, by constricting the tube and keeping the flow steady, C. subterranea saves on ventilation costs by a factor of up to six compared with oscillatory flow in a tube without the tail-fan constriction.
    Type of Medium: Online Resource
    ISSN: 0022-0949 , 1477-9145
    URL: Article
    DOI: 10.1242/jeb.201.14.2159
    Language: English
    Publisher: The Company of Biologists
    Publication Date: 1998
    detail.hit.zdb_id: 1482461-9
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  • 10
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    Online Resource
    HOW THE BODY CONTRIBUTES TO THE WAKE IN UNDULATORY FISH SWIMMING
    The Company of Biologists ; 2001
    In:  Journal of Experimental Biology Vol. 204, No. 16 ( 2001-08-15), p. 2751-2762
    Details
    In: Journal of Experimental Biology, The Company of Biologists, Vol. 204, No. 16 ( 2001-08-15), p. 2751-2762
    Abstract: Undulatory swimmers generate thrust by passing a transverse wave down their body. Thrust is generated not just at the tail, but also to a varying degree by the body, depending on the fish's morphology and swimming movements. To examine the mechanisms by which the body in particular contributes to thrust production, we chose eels, which have no pronounced tail fin and hence are thought to generate all their thrust with their body. We investigated the interaction between body movements and the flow around swimming eels using two-dimensional particle image velocimetry. Maximum flow velocities adjacent to the eel's body increase almost linearly from head to tail, suggesting that eels generate thrust continuously along their body. The wake behind eels swimming at 1.5Ls-1, where L is body length,consisted of a double row of double vortices with little backward momentum. The eel sheds two vortices per half tail-beat, which can be identified by their shedding dynamics as a start—stop vortex of the tail and a vortex shed when the body-generated flows reach the `trailing edge' and cause separation. Two consecutively shed ipsilateral body and tail vortices combine to form a vortex pair that moves away from the mean path of motion. This wake shape resembles flow patterns described previously for a propulsive mode in which neither swimming efficiency nor thrust is maximised but sideways forces are high. This swimming mode is suited to high manoeuvrability. Earlier recordings show that eels also generate a wake reflective of maximum swimming efficiency. The combined findings suggest that eels can modify their body wave to generate wakes that reflect their propulsive mode.
    Type of Medium: Online Resource
    ISSN: 1477-9145 , 0022-0949
    URL: Article
    DOI: 10.1242/jeb.204.16.2751
    Language: English
    Publisher: The Company of Biologists
    Publication Date: 2001
    detail.hit.zdb_id: 1482461-9
    SSG: 12
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