Form Alternation of Adult Female Crayfishes of the Genus Orconectes (Decapoda: Cambaridae)

Wetzel, James E.

doi:10.1674/0003-0031(2002)147[0326:faoafc]2.0.co;2

Cited by 40 publications

(20 citation statements)

References 24 publications

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“…The cyclic dimorphism (form alteration) occurs in mature males of all cambarid genera and was also reported from Orconectes spp. females (Wetzel, 2002;Buřič et al, 2010). In O. immunis and O. limosus, form I males (hereafter m I) differ from form II (hereafter m II) in having distinctly larger chelae (Chucholl, 2006) and more slender and pronounced gonopod tips.…”

Section: > Measurementsmentioning

confidence: 99%

“…The mesial gap between the terminal elements of the 1st gonopod is also conspicuously wider. Form I females (hereafter f I) have a distinctly wider pleon than form II females (hereafter f II; Wetzel, 2002;Buřič et al, 2010) and usually show the above-mentioned reproductive traits. Moreover, form I individuals of O. immunis often have conspicuously purple-coloured chelae.…”

Section: > Measurementsmentioning

confidence: 99%

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Understanding invasion success: life-history traits and feeding habits of the alien crayfishOrconectes immunis(Decapoda, Astacida, Cambaridae)

Chucholl

2012

Knowl. Managt. Aquatic Ecosyst.

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In the present study, the life history and diet of the highly successful North American invader Orconectes immunis was assessed for the first time in its introduced European range. In 2007, O. immunis population dynamics were monitored in a typical backwater habitat using unbaited funnel traps, and its life history was analysed using Von Bertalanffy's growth function. Juveniles hatched as early as March and may attain sexual maturity at the end of their first summer. The adult population moulted up to four times during the summer months, with the non-breeding form (II) lasting for a remarkably short time period. The high growth rate of O. immunis was combined with a short longevity, which was estimated at 2.5 years. The fecundity ranged from 119 to 495 pleopodal eggs. The stomach contents were dominated by detritus, followed by macroinvertebrates and macrophytes, and no ontogenetic shift in diet was observed. The ability to prey on a wide array of invertebrate taxa presumably supports the sustained high growth rate of O. immunis. The presented data provide evidence that O. immunis exhibits a strongly r-selected life history and omnivorous feeding habits. These ecological properties have often been linked to successful invaders and enhance the invasiveness of O. immunis.

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Section: > Measurementsmentioning

confidence: 99%

Section: > Measurementsmentioning

confidence: 99%

Understanding invasion success: life-history traits and feeding habits of the alien crayfishOrconectes immunis(Decapoda, Astacida, Cambaridae)

Chucholl

2012

Knowl. Managt. Aquatic Ecosyst.

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“…They were kept in the lab in single-sex tanks and offered fish chow every few days. To be considered for inclusion in the experiment, males and females were confirmed to be reproductive by the presence of hooks on the second walking legs (Payne 1996) and glair glands (Wetzel 2002), respectively.…”

Section: Methodsmentioning

confidence: 99%

The mate pursuit-predation avoidance tradeoff in the virile crayfish,Orconectes virilis

Pecor

2006

Marine and Freshwater Behaviour and Physiology

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To better understand the tradeoff between mate pursuit and predation risk avoidance, the responses of male virile crayfish (Orconectes virilis) to female sex pheromone and conspecific alarm cue, alone and in combination were tested. Male crayfish were more active and exhibited less antipredator behavior in the pheromone treatment than in either the pheromone þ alarm or alarm treatment. The results suggest a tradeoff in favor of risk avoidance when pheromone and risk stimuli are encountered together.

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“…Cambarid (males and females) (Hobbs, 1989;Wetzel, 2002;Buřič et al, 2010) and astacids (males and females) (Buřič et al, 2015) are cyclically dimorphic. The mating period is characterized by increased activity when sexually mature adult individuals actively seek their partners (Buřič et al, 2009).…”

Section: Sexual Reproduction In the Crayfishmentioning

confidence: 99%

Different aspects of reproduction strategies in crayfish: A review

Yazicioglu

Reynolds

Kozák

2016

Knowl. Manag. Aquat. Ecosyst.

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-Study of the reproductive strategy of crayfish species is of great importance in the current astacological world. Crayfish are among the largest freshwater invertebrates, and as keystone species, they are able to regulate the structure of the benthic fauna in the freshwaters, demonstrating different ecological strategies and life spans ranging up to 20+ years. In order to bring together the various pieces of information related to this issue, this overview of published scientific reports was conducted. The majority of crayfish species studied show sexual dimorphism, with approximately equal numbers of males and females. However, over some decades numerous observations have been made for a few species that may have different modes of reproduction, such as hermaphroditism or intersex (e.g. Cherax quadricarinatus, Samastacus spinifrons, Parastacus virilastacus and Pacifastacus leniusculus) and parthenogenesis (only Procambarus fallax f. virginalis).A recent study showed a new case of parthenogenesis as apomictic parthenogenesis (only Orconectes limosus). In addition, there are many investigations into the reproduction biology of crayfish, including using eyestalk ablation or androgenic gland ablation under various lab conditions and hybridization under natural conditions (e.g. Astacus astacus X Astacus leptodactylus, Orconectes rusticus X Orconectes propinquus). There are also some chemical factors which could possibly affect the reproduction system of crayfish in the wild.Key-words: crustacea / parthenogenesis / intersex / hybridization Résumé -Différents aspects des stratégies de reproduction des écrevisses : une revue. L'étude de la stratégie de reproduction des espèces d'écrevisses est d'une grande importance dans le monde astacicole actuel. Les écrevisses sont parmi les plus grands invertébrés d'eau douce, et comme des espèces clés, elles sont capables de réguler la structure de la faune benthique dans les eaux douces, présentant différentes stratégies écologiques et des durées de vie allant jusqu'à 20 ans. Afin de réunir les différents éléments d'information relatifs à cette question, une revue des publications scientifiques a été conduite. La majorité des espèces d'écrevisses étudiées montrent un dimorphisme sexuel, avec un nombre approximativement égal de mâles et de femelles. Cependant, depuis quelques décennies, de nombreuses observations ont été faites pour quelques espèces qui peuvent avoir différents modes de reproduction, tels que l'hermaphrodisme ou l'intersexe (par exemple Cherax quadricarinatus, Samastacus spinifrons, Parastacus virilastacus et Pacifastacus leniusculus) et la parthénogenèse (seulement Procambarus fallax f. virginalis). Une étude récente a montré un nouveau cas de parthénogenèse, une parthénogenèse apomictique (seulement Orconectes limosus). En outre, il y a beaucoup de recherches sur la biologie de la reproduction de l'écrevisse, y compris celle de l'ablation du pédoncule oculaire ou ablation de la glande androgène dans diverses conditions de laboratoire et de l'hybridati...

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Form Alternation of Adult Female Crayfishes of the Genus Orconectes (Decapoda: Cambaridae)

Cited by 40 publications

References 24 publications

Understanding invasion success: life-history traits and feeding habits of the alien crayfishOrconectes immunis(Decapoda, Astacida, Cambaridae)

Understanding invasion success: life-history traits and feeding habits of the alien crayfishOrconectes immunis(Decapoda, Astacida, Cambaridae)

The mate pursuit-predation avoidance tradeoff in the virile crayfish,Orconectes virilis

Different aspects of reproduction strategies in crayfish: A review

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