Results 31 to 40 of about 4,472 (223)
To signal or not to signal? Chemical communication by urine-borne signals mirrors sexual conflict in crayfish [PDF]
BMC Biology, 2010 Sexual selection theory predicts that females, being the limiting sex, invest less in courtship signals than males. However, when chemical signals are involved it is often the female that initiates mating by producing stimuli that inform about sex and/or receptivity.
Breithaupt, Thomas, Berry, Fiona C.
openaire +4 more sources
Animal, 2018 Female crayfish stores male gametes after mating until the beginning of egg laying and fertilization. The aim of the present study was to investigate the duration of post-mating spermatophore storage as well as the timing and temperature of spawning in ...
B. Yazicioglu +3 more
doaj +1 more source
The prevalence of Aphanomyces astaci in invasive signal crayfish from the UK and implications for native crayfish conservation [PDF]
Parasitology, 2017 SUMMARYThe crayfish plague agent, Aphanomyces astaci, has spread throughout Europe, causing a significant decline in native European crayfish. The introduction and dissemination of this pathogen is attributed to the spread of invasive North American crayfish, which can act as carriers for A. astaci.
James, J +6 more
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Exponential increase of signal crayfish in running waters in Sweden – due to illegal introductions?
Knowledge and Management of Aquatic Ecosystems, 2011 Sweden has only one indigenous species of crayfish, the noble crayfish (Astacus astacus, Fabricius). There has been a steady decline of noble crayfish populations in Sweden since 1907, mainly due to the crayfish plague.
Bohman P. +3 more
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Lake Hańcza – a new site for signal crayfish (Pacifastacus leniusculus Dana) occurrence in Poland
Archives of Polish Fisheries, 2018 Crayfish catches were conducted using traps in Lake Hańcza, which is the deepest lake in Poland. Two crayfish populations were found to co-exist in the lake: spiny-cheek crayfish (Orconectes limosus Raf.) and signal crayfish (Pacifastacus leniusculus ...
Ulikowski Dariusz, Chybowski Łucjan
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Biology, 2021 Biological invasions are increasingly recognized ecological and economic threats to biodiversity and are projected to increase in the future. Introduced freshwater crayfish in particular are protruding invaders, exerting tremendous impacts on native ...
Antonín Kouba +9 more
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CRAYFISHERIES IN FINLAND, A SHORT OVERVIEW
Knowledge and Management of Aquatic Ecosystems, 2004 Crayfish trapping and activities related to crayfishing have traditionally been lucrative businesses in rural Finland. The catch itself, varying in the 1990’s from 2 to 4 millions crayfish annually, is worth 4 to 8 millions euros.
JUSSILA J., MANNONEN A.
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Comparative ultrastructure of the antennae and sensory hairs in six species of crayfish [PDF]
PeerJ, 2023 Background Antennae in crayfish are essential for gaining information about the local topography and localising food, chemicals, conspecifics or predator.
Golara Kor +4 more
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Biology, 2021 Immunity is an important component of invasion success since it enables invaders’ adaptation to conditions of the novel environment as they expand their range.
Paula Dragičević +6 more
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Knowledge and Management of Aquatic Ecosystems, 2006 The tendency of population decline of the indigenous crayfish, Austropotamobius pallipes, in Navarra was reduced by the implementation of a plan of restoration in 1996. Recently, a new drop in population numbers has been noticed.
DIÉGUEZ-URIBEONDO J.
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