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Mostrando ítems 11-20 de 44
Habitat use, seasonality and demography of an apex predator: Sevengill shark Notorynchus cepedianus in Northern Patagonia
(Inter-Research, 2018-09)
Gaining insight on how species relate to their environment and other members of the trophic community is critical for their management. We investigated habitat use, seasonal patterns of abundance and population structure ...
Spawning and reproductive potential of Pseudopercis semifasciata (Cuvier, 1829) (Osteichthyes: Pinguipedidae) in coastal waters off Buenos Aires Province (Argentina)
(Elsevier Science, 2020-05)
Pseudopercis semifasciata is a demersal teleostean fish, endemic of the southwest Atlantic Ocean, inhabiting coastal waters from 23° S to 47° S. The present study has the purpose to analyse for the first time the maturitycycle ...
Structural differentiation among annual shoots as related to growth dynamics in Luma apiculata trees (Myrtaceae)
(Elsevier Gmbh, 2018-12)
A close examination of axis differentiation is key to the understanding of plant architecture and its ecological consequences. The present study was aimed at evaluating the relationship between shoot size/structure and ...
Reproductive compensation in female Palaemonetes argentinus (Decapoda: Natantia) due to Microphallus szidati (Trematoda) infection
(Cambridge University Press, 2020-10)
Parasites may affect host demographic characteristics because they can directly or indirectly cause the death of their hosts and/or influence their reproduction. Parasitism is therefore recognized as a factor that influences ...
Climate variability and trends in the reproductive habitat of the critically endangered hooded grebe
(John Wiley & Sons Ltd, 2019-11)
The population of the critically endangered hooded grebe (Podiceps gallardoi) has decreased drastically during recent decades. The effects of climate change on their reproductive area (Southern Patagonia) have been proposed ...
Vigilance patterns of territorial guanacos (Lama guanicoe): The role of reproductive interests and predation risk
(Wiley Blackwell Publishing, Inc, 2008-12)
We conducted focal observations of territorial guanacos, a highly polygynous and social mammal, to compare time budgets between sexes and test the hypothesis that the differences in reproductive interests are associated ...
A developmental approach expanding the knowledge of inflorescence diversity in subtribe Eleusininae (Chloridoideae: Poaceae)
(Wiley Blackwell Publishing, Inc, 2020-07)
Within Chloridoideae, subtribe Eleusininae comprises 237 species with little morphological diversity in its inflorescence structure. This diversity may be explained by an evolution from complex (pyramidal shaped and highly ...
Reproductive inequalities in the acanthocephalan Corynosoma cetaceum: looking beyond "crowding" effects
(BioMed Central, 2018-03)
Background: At present, much research effort has been devoted to investigate overall (average) responses of parasite populations to specific factors, e.g., density-dependence in fecundity or mortality. However, studies on ...
Biología reproductiva de Boana pulchella y Boana punctata (Anura: Hylidae) en poblaciones simpátricas de humedales templadosReproductive biology of Boana pulchella and Boana punctata (Anura: Hylidae) in sympatric populations of temperate wetlands
(Universidad Nacional de Colombia. Facultad de Ciencias.Instituto de Ciencias Naturales, 2019-07)
Boana pulchella habita principalmente climas templados y B. punctata principalmente climas tropicales, lo que permitiría suponer la presencia de estrategias reproductivas diferentes, aún en la región en la que sus poblaciones ...
The Use of hCG for Inducing Ovulation in Sheep Estrus Synchronization Impairs Ovulatory Follicle Growth and Fertility
(MDPI, 2021-04)
Currently, there is an intense effort to find an alternative hormone to eCG to induce ovulation after estrus synchronization treatments in sheep. One of the proposed alternatives is based on the use of hCG, but the results ...