Results 51 to 60 of about 1,828 (138)

Embryos of the viviparous dermapteran, Arixenia esau develop sequentially in two compartments: terminal ovarian follicles and the uterus.

open access: yesPLoS ONE, 2013
Three main reproductive strategies have been described among insects: most common oviparity, ovoviviparity and viviparity. In the latter strategy, the embryonic development takes place within the body of the mother which provides gas exchange and ...
Waclaw Tworzydlo   +2 more
doaj   +1 more source

Tempo and mode of performance evolution across multiple independent origins of adhesive toe pads in lizards [PDF]

open access: yes, 2017
Understanding macroevolutionary dynamics of trait evolution is an important endeavor in evolutionary biology. Ecological opportunity can liberate a trait as it diversifies through trait space, while genetic and selective constraints can limit ...
Austin C. C.   +17 more
core   +3 more sources

Changing Feeding Levels Reveal Plasticity in Elasmobranch Life History Strategies

open access: yesEcology Letters, Volume 28, Issue 9, September 2025.
We analysed life history traits of 151 elasmobranch species for two contrasting feeding levels in a principal components analysis. Two axes, reproductive output and generation turnover, structure elasmobranch life history strategies. Wefound that species' positions in this life history space are dynamic, shifting towards higher reproductive output as ...
Sol Lucas   +3 more
wiley   +1 more source

Reproductive biology of the skates Sympterygia acuta Garman, 1877 and S. bonapartii Müller & Henle, 1841 (Chondrichthyes: Rajoidei) in south Brazil

open access: yesNeotropical Ichthyology
The present study analyzed the sexual development, sizes at maturity and morphometric relationships for both sexes of Sympterygia acutaand S. bonapartii, endemic of south-western Atlantic Ocean.
Alexander Basallo, Maria Cristina Oddone
doaj   +1 more source

Using life history to predict outcomes of conservation translocations of herpetofauna

open access: yesAnimal Conservation, Volume 28, Issue 4, Page 592-606, August 2025.
We collected data on key life history traits for all herpetofauna profiled in the IUCN Global Conservation Translocation Perspectives series to examine how life history can predict outcomes and difficulties of conservation translocations. The relationships we found provide important insights for conservation practitioners that can be used in the ...
M.R. Parker, L.A. Fitzgerald
wiley   +1 more source

Live food organisms – Artemia Part II - Artemia cyst and biomass production [PDF]

open access: yes, 1987
The brine shrimp, Artemia a crustacean which is naturally found in hypersaline waters throughout most of the world, has become the most important source of live-feed for the last twenty years.
Pandian, S K
core  

The chloride channel cystic fibrosis transmembrane conductance regulator (CFTR) controls cellular quiescence by hyperpolarizing the cell membrane during diapause in the crustacean Artemia [PDF]

open access: yes, 2019
Cellular quiescence, a reversible state in which growth, proliferation, and other cellular activities are arrested, is important for self-renewal, differentiation, development, regeneration, and stress resistance.
Bossier, Peter   +10 more
core   +1 more source

Observations on Phallocryptus spinosa (Branchiopoda, Anostraca) populations from the high plateaus of Northeastern Algeria [PDF]

open access: yes, 2015
Phallocryptus spinosa (Thamnocephalidae) is a small primitive crustacean which lives in temporary saline pools of the Palaearctic region called Chott, Sebkha, Garâa or Daya in North Africa. Data on its biology and life history are very scarce despite its

core  

Retention Bans Are Beneficial but Insufficient to Stop Shark Overfishing

open access: yesFish and Fisheries, Volume 26, Issue 3, Page 473-487, May 2025.
ABSTRACT Sharks are among the most threatened groups of exploited fishes, comprising common bycatch across many fisheries. Management efforts intended to safeguard threatened species have increasingly focused on retention bans to reduce bycatch mortality. However, the population effects of such measures remain unevaluated across species.
Leonardo Manir Feitosa   +7 more
wiley   +1 more source

The whale shark: Is the species endangered or vulnerable? [PDF]

open access: yes, 1989
Notable contributions summarising our knowledge of the known habits of the whale shark in general, and its occurrence in Indian coastal waters have been made by Gudger (1935), Chevey (1936) and Prater (1941).
Silas, E G
core  

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