Results 81 to 90 of about 12,024 (277)

Body size–dependent gender role in a simultaneous hermaphrodite freshwater snail, Physa acuta [PDF]

Behavioral Ecology, 2004
We examined whether gender role in the simultaneous hermaphrodite freshwater snail, Physa acuta, is determined by relative body size in a manner predicted by the size-advantage model. We observed the body-size combinations of pairs in the laboratory by using field-collected populations. Smaller individuals tended to play the ‘‘male’’ role (sperm donor),
Kako Ohbayashi-Hodoki, Fumiko Ishihama, Masakazu Shimada   +2 more
openaire   +2 more sources

Environmental DNA Particle Size Distribution and Quantity Differ Across Taxa and Organelles

Environmental DNA, Volume 6, Issue 5, September–October 2024.
ABSTRACT The use of environmental DNA to detect species is now widespread in freshwater ecology. However, the detectability of species depends on many factors, such as the quantity of eDNA particles available in the environment and their state (e.g., free DNA fragments, organellar, or aggregated DNA particles).
Héloïse Verdier, Thibault Datry, Maxime Logez, Lara Konecny‐Duprè, Maïlys Gauthier, Tristan Lefébure   +5 more
wiley   +1 more source

Freshwater snails and Schistosomiasis mansoni in the state of Rio de Janeiro, Brazil: IV - Sul Fluminense Mesoregion

Memorias do Instituto Oswaldo Cruz, 2004
In this paper, the forth of a series dealing with the survey of freshwater gastropods of the state of Rio de Janeiro, the results of collections carried out in the Sul Fluminense Mesoregion from 2000 to 2002 are presented and revealed the occurrence of ...
Silvana C Thiengo, Aline C Mattos, M Fernanda Boaventura, Monica A Fernandez   +3 more
doaj   +1 more source

Food web structures of irrigated rice fields estimated from carbon and nitrogen stable isotopes: Special reference to the role of filamentous green algae as a food resource of aquatic consumers

Ecological Research, Volume 39, Issue 3, Page 318-329, May 2024.
We examined aquatic food web structures in two adjacent rice fields in northeastern Japan using carbon and nitrogen stable isotope ratios. δ13C‐based isotopic mixing model estimated that the majority of herbivores and omnivores, as well as several carnivorous taxa, assimilated carbon derived from filamentous green algae (contributions to carbon ...
Natsuru Yasuno, Gen Kanaya, Eisuke Kikuchi   +2 more
wiley   +1 more source

Planorbidae, Lymnaeidae and Physidae of Argentina (Mollusca: Basommatophora)

Memorias do Instituto Oswaldo Cruz, 2005
In the course of several trips to Argentina I had the opportunity of collecting specimens of Acrorbis petricola Odhner,1937, Biomphalaria orbignyi Paraense, 1975, B. peregrina (Orbigny, 1835), B. tenagophila (Orbigny, 1835) Lymnaea viatrix Orbigny, 1835,
W Lobato Paraense
doaj   +1 more source

Будова тертки молюсків підродини Physinae (Mollusca: Gastropoda: Pulmonata) [PDF]

, 2012
Проаналізовано показники терток семи видів молюсків підродини Physinae (Physa fontinalis, Ph. adversa, Ph. skinneri, Ph. bulla, Physella acuta, Phys. heterostropha, Costatella integra).
Гарлінська (Лейченко), А. М.
core  

Fitness effects of assisted gene flow in an endangered salmonid population

Conservation Science and Practice, Volume 6, Issue 1, January 2024.
This study investigates the impact of assisted gene flow on the fitness of an endangered landlocked salmon population. Our results reveal that while assisted gene flow can have a positive influence on individual growth, it can also lead to decreased survival rates under predation risk.
Ines Klemme, Joonas Pysäys, Pekka Hyvärinen, Anssi Karvonen   +3 more
wiley   +1 more source

Freshwater Gastropoda in Diyala River: A Study on Diversity, Distribution, and Environmental Variation

Proceedings of the International Conference on Applied Innovations in IT
This field study investigated the diversity, spatiotemporal distribution, and environmental relations of freshwater gastropods in the Diyala River (Iraq). Monthly surveys were conducted from September 2024 to March 2025 at three stream sites (Mahroot, Al-
Nabaa Rashid Azeez, Khansaa S. Farman
doaj   +1 more source

Planorbidae, Lymnaeidae and Physidae of Ecuador (Mollusca: Basommatophora)

Memorias do Instituto Oswaldo Cruz, 2004
In the course of a trip to Ecuador I had the opportunity of collecting topotypic specimens of the following nominal species of pulmonate molluscs: Biomphalaria cousini Paraense, 1966; Planorbis equatorius Cousin, 1887; P.
W Lobato Paraense
doaj   +1 more source

Комплексний аналіз конхіологічних ознак видів родини Physidae (Mollusca, Pulmonata) України [PDF]

, 2009
Здійснено комплексний аналіз конхіологічних характеристик трьох видів молюсків родини Physidae. Використання кореляційного, дисперсій-ного, дискримінантного аналізів дало змогу за сукупністю якісних (форма черепашки, скульптурованість поверхні та її ...
Гарлінська (Лейченко), А. М.
core