The Association of Copepods with Marine Invertebrates

Gotto, R. V.

doi:10.1016/s0065-2881(08)60292-8

Cited by 55 publications

(30 citation statements)

References 89 publications

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“…To our knowledge, this is the first report of the food habit of Hemicyclops spp. In contrast, there are reports on other poecilostomatoid copepods that directly feed on the mucous (in Paranthessius anemoniae Claus, Ostrincola koe Tanaka, Conchyliurus quintus Tanaka, Modiolicola bifida Tanaka) or blood (Selioides bocqueti Carton) from the hosts or tubes of the hosts [Myxomolgus myxicolae (Bocquet and Stock), M. proximus Humes and Stock] (Gotto 1979). The associations of these copepods may be viewed as parasitism, and feeding is an essential factor necessitating their association with the hosts.…”

Section: Food Habitsmentioning

confidence: 99%

Life history of the copepod Hemicyclops gomsoensis (Poecilostomatoida, Clausidiidae) associated with decapod burrows in the Tama-River estuary, central Japan

Itoh¹,

Nishida

2007

Plankton Benthos Res

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A 17-month field survey and laboratory experiments were conducted to investigate the life cycle, seasonal population fluctuations, and salinity tolerance in the poecilostomatoid copepod Hemicyclops gomsoensis associated with the burrows of the mud shrimp Upogebia major and the ocypodid crab Macrophthalmus japonicus in the mud-flats of the Tama-River estuary, central Japan. On the basis of sample collections in the water column and from the burrows, it was revealed that H. gomsoensis is planktonic during the naupliar stages and settles on the bottom during the first copepodid stage to inhabit the burrows of U. major and, to a lesser extent, those of M. japonicus. While females carrying egg-sacs were present throughout the year, the copepods' reproduction took place mainly during early summer to autumn with a successive decrease from autumn to winter. Occasionally the copepod populations in the burrows suffered from severe flushes of river water that led to salinity decreases in the burrow water to fatal levels, but usually the salinity in the burrow was within optimal levels and permitted recovery and maintenance of the populations.

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Section: Food Habitsmentioning

confidence: 99%

Life history of the copepod Hemicyclops gomsoensis (Poecilostomatoida, Clausidiidae) associated with decapod burrows in the Tama-River estuary, central Japan

Itoh¹,

Nishida

2007

Plankton Benthos Res

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“…A remarkable difference of G. japonica from the four other species is that G. japonica males guard copepodids from the first symbiotic stage II onwards. The youngest stages of the four other species guarded by adult males are CIII (Stock et al 1962, Gotto 1979, Do et al 1984, except for H. spinulosus, of which the youngest guarded stage was unknown because observation of precopulatory guarding behavior was made only on a CV female and two adult males collected from the field (Itoh & Nishida 2008). Pseudomyicola spinosus and H. spinulosus start symbiotic life at CI (Do et al 1984, Itoh & Nishida 2008, indicating that adult males do not guard CI or CII, even if they encounter them.…”

Section: Discussionmentioning

confidence: 99%

Life cycle and precopulatory mate guarding of <i>Goidelia japonica</i> (Copepoda: Poecilostomatoida: Echiurophilidae) associated with the echiuran <i>Urechis unicinctus</i>

Ijichi

Itani

Ueda

2017

Plankton Benthos Res

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Abstract:The life cycle and precopulatory mate guarding behavior of the poecilostomatoid copepod Goidelia japonica associated with the spoon worm Urechis unicinctus (Echiura) are described based on specimens from 19 worms collected from western Japan. A total of 676 copepods were collected from the host s rectum (494 copepods) and body surface (182 copepods). Copepod numbers were significantly correlated with host weight. Copepods in the rectum consisted almost completely of copepodids (35%) and adult males (65%), with only one non-ovigerous adult female recorded. In contrast, those on the body surface were all adult males (24%) or females (76%), of which 58% were ovigerous. No nauplii or CI occurred. In the rectum, 36% of the adult males guarded 67% of the copepodids, consisting of CII-CV. From these results, their life cycle is considered as follows: nauplii and CI live as plankton; just before or after molting to CII, they enter the host s rectum and females are probably soon guarded by males; they grow up to CV there; CV females guarded by males move to the body surface just before the final molt; on the body surface females molt to adults and spawn eggs. Guarding the first symbiotic stage (CII) is a unique precopulatory behavior for symbiotic poecilostomatoid copepods. This can be explained from the viewpoint of evolutionary resolution of the intersexual conflict and advantage for early copepodids in precopula.

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“…However, the copepodids, adult males and immature females of S. illgi have been recorded to move between polychaetes of different genera and species which occur in the same area (Gotto 1979). The presence of a number of different cohorts, which included both copepodid and adult stages, and with the first copepodid stage thought to be the infective stage (Dudley 1964), seems to rule out the likelihood of an intermediate host (1, 21-40; 2, 41-60; 3, 61-80; 4, 81-120).…”

Section: Discussionmentioning

confidence: 99%

Characteristics of the association between the marine copepod, Gastrodelphys clausii, and its fanworm host Bispira volutacornis

Nash

Keegan

2005

Helgol Mar Res

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Characteristics of the association of the marine copepod Gastrodelphys clausii with its fanworm host Bispira volutacornis were investigated from October 1997 to August 1999. Of the 982 hosts examined, 22.6% were infected, with male copepods outnumbering females. Prevalence varied between 3 and 90% during the study period and showed a seasonal pattern with a summer and late autumn/winter peak. Hosts were observed to harbour both single and multiple infections. The aggregation of parasites within the host population was overdispersed, displaying a characteristically clumped pattern. G. clausii reaches adulthood in males at ca. 800 lm in length, with recorded total lengths extending to 1,875 lm. Females at maturity were recorded to be ca. 1,000 lm, with a maximum total length of 3,250 lm recorded for an ovigerous female. Copepods were mobile within the branchial crown and showed no statistical preference for branchial crowns of different sizes. A positional pattern, however, was observed with juvenile copepods observed to occupy radioles further from the prostomium, as the branchial crown increases the number of radioles in each spiral. Contrary to this, the majority of female copepods were located attached to the radioles closest to the prostomium irrespective of crown size.

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The Association of Copepods with Marine Invertebrates

Cited by 55 publications

References 89 publications

Life history of the copepod Hemicyclops gomsoensis (Poecilostomatoida, Clausidiidae) associated with decapod burrows in the Tama-River estuary, central Japan

Life history of the copepod Hemicyclops gomsoensis (Poecilostomatoida, Clausidiidae) associated with decapod burrows in the Tama-River estuary, central Japan

Life cycle and precopulatory mate guarding of <i>Goidelia japonica</i> (Copepoda: Poecilostomatoida: Echiurophilidae) associated with the echiuran <i>Urechis unicinctus</i>

Characteristics of the association between the marine copepod, Gastrodelphys clausii, and its fanworm host Bispira volutacornis

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