GLORIA

GEOMAR Library Ocean Research Information Access

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1
    In: Waterbirds, Waterbird Society, Vol. 33, No. 4 ( 2010-12), p. 518-526
    Type of Medium: Online Resource
    ISSN: 1524-4695 , 1938-5390
    Language: English
    Publisher: Waterbird Society
    Publication Date: 2010
    detail.hit.zdb_id: 2159270-6
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2003
    In:  The Auk Vol. 120, No. 1 ( 2003), p. 55-
    In: The Auk, Oxford University Press (OUP), Vol. 120, No. 1 ( 2003), p. 55-
    Type of Medium: Online Resource
    ISSN: 0004-8038
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2003
    detail.hit.zdb_id: 2065970-2
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    Online Resource
    Online Resource
    Instituto de Ecologia, A.C. ; 2009
    In:  ACTA ZOOLÓGICA MEXICANA (N.S.) Vol. 25, No. 3 ( 2009-12-06), p. 589-608
    In: ACTA ZOOLÓGICA MEXICANA (N.S.), Instituto de Ecologia, A.C., Vol. 25, No. 3 ( 2009-12-06), p. 589-608
    Abstract: Entre marzo de 2004 y marzo de 2005 se realizaron veinticuatro salidas de campo quincenales de avistamiento y registro de aves costeras en 6 unidades ambientales del Estero de Punta Banda, Baja California, México. Se registraron 35 familias y 104 especies; 64 estuvieron asociadas al ambiente acuático. La estructura de las comunidades de aves acuáticas y terrestres presentó una secuencia temporal que se caracterizó por la formación de dos grupos asociados con las condiciones de invierno o verano y otro más pequeño formado por los censos efectuados en la transición entre ambas estaciones. Doce especies aparecen enlistadas en alguna categoría de protección en la Norma Oficial Mexicana. Se registró el éxito reproductivo de dos especies residentes (Rallus longirostris e Himantopus mexicanus) en áreas disturbadas por estructuras costeras hechas por el hombre. Los resultados indican que el Estero de Punta Banda es importante como área de reproducción, alimentación y descanso de muchas especies de aves residentes y migratorias. Sin embargo, el acelerado crecimiento urbano de la ciudad de Ensenada, la contaminación y el uso desordenado de sus recursos amenaza su presencia y supervivencia
    Type of Medium: Online Resource
    ISSN: 2448-8445 , 0065-1737
    Language: Unknown
    Publisher: Instituto de Ecologia, A.C.
    Publication Date: 2009
    detail.hit.zdb_id: 2274730-8
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 4
    In: Waterbirds, Waterbird Society, Vol. 43, No. 1 ( 2020-5-19), p. 1-
    Type of Medium: Online Resource
    ISSN: 1524-4695
    Language: Unknown
    Publisher: Waterbird Society
    Publication Date: 2020
    detail.hit.zdb_id: 2159270-6
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 5
    Online Resource
    Online Resource
    Sociedad para el Estudio y Conservacion de las Aves en Mexico A.C. ; 2019
    In:  Huitzil Revista Mexicana de Ornitología Vol. 20, No. 2 ( 2019-09-25), p. 1-9
    In: Huitzil Revista Mexicana de Ornitología, Sociedad para el Estudio y Conservacion de las Aves en Mexico A.C., Vol. 20, No. 2 ( 2019-09-25), p. 1-9
    Abstract: Describimos la presencia, estructura, número de huevos y éxito de eclosión de los nidos de Rallus obsoletus levipes (rascón picudo), un ave protegida en México y Estados Unidos, durante las temporadas de anidación de 2016 a 2018 en el Estero de Punta Banda (EPB), Ensenada, Baja California, México. El número de huevos por nido fue de 6, 7 u 8 y el éxito de eclosión de 0, 75 o 100%. Asimismo reportamos la abundancia y densidad de Geukensia demissa (mejillón rayado, un bivalvo invasor) en el sitio de estudio. Las densidades de G. demissa por zona de marisma fueron: Marisma Interna (MI) 5.36/m2, Marisma Media (MM) 6.94 y Marisma Externa (ME) 3.52. El número de bivalvos no es independiente de la zona de marisma, p 〈 0.001. Documentamos la muerte de dos polluelos de R. o. levipes encontrados muertos y ahogados en las valvas de G. demissa durante mareas altas en el EPB. No encontramos una asociación entre la cobertura vegetal dominante, Spartia foliosa y Salicornia spp. y la presencia de G. demissa. Su presencia parece ser independiente de la presencia de vegetación. La permanencia de R. o. levipes en el EPB depende de un mejor conocimiento de la población y sus interacciones con G. demissa y otras amenazas en el EPB. Discutimos el rol de G. demissa en el futuro de R. o. levipes en el EPB. Se deben elaborar propuestas para que los sitios con una elevación mayor al nivel medio de marea sean considerados como críticos para la anidación y persistencia del ave.
    Type of Medium: Online Resource
    ISSN: 1870-7459
    URL: Issue
    Language: Unknown
    Publisher: Sociedad para el Estudio y Conservacion de las Aves en Mexico A.C.
    Publication Date: 2019
    detail.hit.zdb_id: 2458043-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 6
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2003
    In:  The Auk Vol. 120, No. 1 ( 2003-01-01), p. 55-61
    In: The Auk, Oxford University Press (OUP), Vol. 120, No. 1 ( 2003-01-01), p. 55-61
    Abstract: To estimate annual apparent local survival, we collected capture–resighting data on 256 individually marked male Western Sandpipers (Calidris mauri) wintering at Estero de Punta Banda, Mexico, between 1994–1997. A hierarchical modeling approach was used to address the effect of age class and year on survivorship rates. The best-fit model included a constant apparent survival probability (ϕ = 0.489; 95% CI = 0.410–0.569), but several models fit nearly as well, and averaging among the top five, to account for model uncertainty, suggested that adults had somewhat higher values than juveniles (ϕ = 0.490 ± 0.051 vs. 0.450 ± 0.067). Detection probability was substantially higher for adults than for juveniles (p = 0.741 vs. p = 0.537). Those apparent survival estimates are low compared with those from other studies of Western Sandpipers at breeding and other nonbreeding locations, and substantially lower than the true survivorship rates expected for small sandpipers in general. We interpret these results as indicating that this site is of below average quality for nonbreeding male Western Sandpipers.
    Type of Medium: Online Resource
    ISSN: 1938-4254 , 0004-8038
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2003
    detail.hit.zdb_id: 2065970-2
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 7
    Online Resource
    Online Resource
    The Company of Biologists ; 1995
    In:  Journal of Experimental Biology Vol. 198, No. 11 ( 1995-11-01), p. 2245-2251
    In: Journal of Experimental Biology, The Company of Biologists, Vol. 198, No. 11 ( 1995-11-01), p. 2245-2251
    Abstract: We used Doppler radar readings of the flight speeds of foraging, lactating female Lasiurus borealis (N=826) and Lasiurus cinereus (N=544) to test morphologically based predictions about their flight performance. Both species flew at speeds (V=6.7 and 7.7 m s−1, respectively) that differed significantly from predicted minimum power speed (Vmp ; 4.0 and 5.08 m s−1, respectively) or predicted maximum range speed (Vmr ; 5.25 and 6.69 m s−1, respectively), perhaps reflecting the active pursuit of moths performing evasive manoeuvres. Estimates of costs of flight and lactation are combined with data on prey size together with encounter and capture rates to illustrate the energetic benefits accruing to these species when they forage in concentrations of insects.
    Type of Medium: Online Resource
    ISSN: 0022-0949 , 1477-9145
    Language: English
    Publisher: The Company of Biologists
    Publication Date: 1995
    detail.hit.zdb_id: 1482461-9
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 8
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1997
    In:  Canadian Journal of Zoology Vol. 75, No. 7 ( 1997-07-01), p. 1176-1183
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 75, No. 7 ( 1997-07-01), p. 1176-1183
    Abstract: Aerodynamic power equations predict optimal speeds at which birds ought to fly if they are to maximize time spent in the air on a given energy store (minimum power speed, V mp ), distance covered using a given amount of fuel (maximum range speed, V mr ), and rate of delivering food to the chicks in the nest (V nest ), or maximize the daily energy balance (V DBAL ). With the aerodynamic model employed, these speeds are 5.3, 7.0, 7.9, and 8.9 m∙s −1 , respectively, for the Barn Swallow, Hirundo rustica. A comparison of the predicted flight speed with both the mean and median flight speeds (8 m∙s −1 in both cases; n = 821) recorded with Doppler radar indicates that Barn Swallows fly at speeds not significantly different from V nest . The true sample size was unknown, and realistic sample sizes are drawn with bootstrap procedures and compared with those given by the number of measurements (821); no significant differences were found. To test the model, energy requirements for growth, prey density, and time spent foraging were varied independently in a sensitivity analysis. Large but realistic changes in these three variables do not contradict the model and predict speeds within the range measured in the field.
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    RVK:
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1997
    detail.hit.zdb_id: 1490831-1
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 9
    In: Ornithological Applications, Oxford University Press (OUP), Vol. 125, No. 1 ( 2023-03-25)
    Abstract: A major barrier to advancing ornithology is the systemic exclusion of professionals from the Global South. A recent special feature, Advances in Neotropical Ornithology, and a shortfalls analysis therein, unintentionally followed a long-standing pattern of highlighting individuals, knowledge, and views from the Global North, while largely omitting the perspectives of people based within the Neotropics. Here, we review current strengths and opportunities in the practice of Neotropical ornithology. Further, we discuss problems with assessing the state of Neotropical ornithology through a northern lens, including discovery narratives, incomplete (and biased) understanding of history and advances, and the promotion of agendas that, while currently popular in the north, may not fit the needs and realities of Neotropical research. We argue that future advances in Neotropical ornithology will critically depend on identifying and addressing the systemic barriers that hold back ornithologists who live and work in the Neotropics: unreliable and limited funding, exclusion from international research leadership, restricted dissemination of knowledge (e.g., through language hegemony and citation bias), and logistical barriers. Moving forward, we must examine and acknowledge the colonial roots of our discipline, and explicitly promote anti-colonial agendas for research, training, and conservation. We invite our colleagues within and beyond the Neotropics to join us in creating new models of governance that establish research priorities with vigorous participation of ornithologists and communities within the Neotropical region. To include a diversity of perspectives, we must systemically address discrimination and bias rooted in the socioeconomic class system, anti-Blackness, anti-Brownness, anti-Indigeneity, misogyny, homophobia, tokenism, and ableism. Instead of seeking individual excellence and rewarding top-down leadership, institutions in the North and South can promote collective leadership. In adopting these approaches, we, ornithologists, will join a community of researchers across academia building new paradigms that can reconcile our relationships and transform science. Spanish and Portuguese translations are available in the Supplementary Material.
    Type of Medium: Online Resource
    ISSN: 0010-5422 , 2732-4621
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2023
    detail.hit.zdb_id: 215921-1
    detail.hit.zdb_id: 2066173-3
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 10
    Online Resource
    Online Resource
    Instituto de Investigaciones Oceanologicas ; 2013
    In:  Ciencias Marinas Vol. 39, No. 3 ( 2013-09-01), p. 277-290
    In: Ciencias Marinas, Instituto de Investigaciones Oceanologicas, Vol. 39, No. 3 ( 2013-09-01), p. 277-290
    Abstract: To assess the feeding habits of Rhinobatos glaucostigma (speckled guitarfish), the stomach contents of 176 individuals were examined. Specimens were obtained from the artisanal gillnet fisheries operating off Nayarit, Mexico, in the southeastern region of the Gulf of California, during January–August 2008 and January–May 2009. Relative measures of prey quantities and nonparametric multivariate methods were used to analyze diet differences between sex and maturity stages. The trophic relationship and feeding strategy were determined using Levin’s niche amplitude index, the Costello method modified by Amundsen, and Pianka’s diet overlap index. The overall diet was dominated by crustaceans, primarily decapods, brachyurans, and cumaceans. Diets were similar between sexes and maturity stages, except between mature females and males where only slight differences were found. Mature females and immature specimens of both sexes showed specialized diets, while mature males had a generalist diet. A significant overlap between sexes and maturity stage diets was found. Diet compositions allowed us to estimate a standardized trophic level of 3.57 for R. glaucostigma. The diet compositions between sexes and maturity stages suggest that all individuals consume similar prey items and have similar trophic roles in the benthic community of the southeastern region of the Gulf of California, where R. glaucostigma should be considered a secondary consumer. 
    Type of Medium: Online Resource
    ISSN: 2395-9053 , 0185-3880
    Language: Unknown
    Publisher: Instituto de Investigaciones Oceanologicas
    Publication Date: 2013
    detail.hit.zdb_id: 2227418-2
    detail.hit.zdb_id: 845442-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...