The social and reproductive behavior of the eyed flounder,Bothus ocellatus, with notes on the spawning ofBothus lunatus andBothus ellipticus

Konstantinou, Hera; Shen, David C.

doi:10.1007/bf00008245

Cited by 35 publications

(30 citation statements)

References 8 publications

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“…Halibut are known to forage in the water column, as evidenced by pelagic prey in their diet (Best & St. Pierre 1986, Orlov 1997 and incidental capture of halibut in the salmon troll-fishery (Gilroy et al 2004). Movement into the water column during spawning has been observed in numerous flatfishes (Konstantinou & Shen 1995, Manabe et al 2000, Manabe & Shinomiya 2001, Carvalho et al 2003, and may be exhibited in halibut.…”

Section: Environmental Datamentioning

confidence: 99%

Seasonal migration and environmental conditions of Pacific halibut Hippoglossus stenolepis, elucidated from pop-up archival transmitting (PAT) tags

Loher¹,

Seitz²

2006

Mar. Ecol. Prog. Ser.

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Pop-up archival transmitting (PAT) tags were used to study the fall migration of halibut in the Gulf of Alaska (GOA). We tagged 6 Pacific halibut Hippoglossus stenolepis on summer feeding grounds in the eastern GOA and another 6 in the western GOA from June 13 to August 6, 2002. The tags were programed to be released from the fish on January 15, 2003, at the height of the winter spawning season: 10 tags successfully detached, transmitted archived environmental data (depth and temperature), and generated accurate latitude-longitude coordinates shortly after pop-up; 2 tags deployed off SE Alaska were lost. The tags revealed that 6 fish had moved a considerable distance (> 200 km) between tagging and pop-up, and all of these had moved northward to some extent. The longest of the observed migrations was from the southern Alaska Peninsula to Yakutat Bay, a linear displacement of 1153 km; 4 fish showed little evidence of geographic displacement, exhibiting migrations that ranged only from 30 to 69 km. Although 2 fish had moved inshore by the end of the tagging period, all other fish had moved offshore regardless of their overall migration distance. The precise timing of offshore movements varied, beginning as early as August and as late as January. These observations generally corroborate conventional tagging, indicating migration of halibut toward winter spawning grounds in the northern GOA, and movement of fish to deep water in fall. However, no single stereotypic migration behavior was apparent, and a variety of vertical movement patterns and temperature profiles were observed. Halibut spent most time in waters of 5 to 7°C, but experienced temperatures ranging from 2.6 to 11.6°C. Depth observations ranged from 0 to 736 m, with summertime activity concentrated in depths from 0 to 400 m, and halibut that exhibited offshore movement were typically observed at 300 to 700 m by mid-winter. Vertical movement (short-period changes in depth) varied among fish and over time, with some fish displaying little vertical activity, others displaying short periods of activity, and still others displaying considerable activity throughout their time at liberty.

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Section: Environmental Datamentioning

confidence: 99%

Seasonal migration and environmental conditions of Pacific halibut Hippoglossus stenolepis, elucidated from pop-up archival transmitting (PAT) tags

Loher¹,

Seitz²

2006

Mar. Ecol. Prog. Ser.

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“…The behavior is described for one paralychthyid, bastard halibut, Taphops oligolepis, off Japan (Manabe & Shinomiya 2001), and six bothids: wide-eyed flounder, Bothus podas, off the Azore Islands (Carvalho et al 2003), Caribbean eyed flounder, Bothus ocellatus, Peacock flounder, Bothus lunatus, and Bothus ellipticus off the Netherland Antilles Islands (Konstantinou & Shen 1995), lefteye flounder, Engyprosopon grandisquama, off Japan (Manabe et al 2000), and Kobe flounder, Crossorhombus kobensis, off Japan (Moyer et al 1985). All of these flatfish species follow a spawning routine consisting of three stages: courtship, spawning rise, and post-spawning.…”

Section: Introductionmentioning

confidence: 99%

Identifying spawning behavior in Pacific halibut, Hippoglossus stenolepis, using electronic tags

et al. 2005

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SynopsisIdentifying spawning behavior in Pacific halibut, Hippoglossus stenolepis, is particularly challenging because they occupy a deep, remote environment during the spawning season. To identify spawning events, a method is needed in which direct observation by humans is not employed. Spawning behavior of seven other flatfish species has been directly observed in their natural environment by investigators using SCUBA. All of these flatfish species display almost identical spawning behavior that follows a routine. Therefore, it is reasonable to believe that this spawning behavior occurs in other flatfish species, including Pacific halibut. As part of a larger study, we recaptured two Pacific halibut on which Pop-up Archival Transmitting (PAT) tags had been attached during the winter spawning season. Because the tags were physically retrieved, we were able to collect minute-by-minute depth records for 135 and 155 days. We used these depth data to tentatively identify spawning events. On seven separate occasions between 20 January 2001 and 9 February 2001, one fish displayed a conspicuous routine only seen during the spawning season of Pacific halibut and the routine parallels the actions of other spawning flatfish directly observed by humans using SCUBA. Therefore, we propose this routine represents spawning behavior in Pacific halibut. The second tagged fish did not display the conspicuous routine, thus challenging the assumption that Pacific halibut are annual spawners. PAT tags may prove to be a useful tool for identifying spawning events of Pacific halibut, and that knowledge may be used for improved management in the future.

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“…The ovary/testes size ratio of C. zanzibarensis is therefore indicative of pair spawning, as is the case in other flatfish. Observations on spawning behaviour in other flatfish species suggest that pair spawning takes place in a manner in which the male swims under the female and lifts her off the substratum into the water column to spawn (Konstantinou and Shen 1995). Close contact during the spawning process would (p > 0.05), whereas both the female and combined sexes linear regression models were significant (p < 0.05).…”

Section: Discussionmentioning

confidence: 94%

Biology of the redspotted tonguesole Cynoglossus zanzibarensis (Pleuronectiformes: Cynoglossidae) on the Agulhas Bank, South Africa

Booth¹,

Walmsley-Hart²

2000

South African Journal of Marine Science

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The social and reproductive behavior of the eyed flounder,Bothus ocellatus, with notes on the spawning ofBothus lunatus andBothus ellipticus

Cited by 35 publications

References 8 publications

Seasonal migration and environmental conditions of Pacific halibut Hippoglossus stenolepis, elucidated from pop-up archival transmitting (PAT) tags

Seasonal migration and environmental conditions of Pacific halibut Hippoglossus stenolepis, elucidated from pop-up archival transmitting (PAT) tags

Identifying spawning behavior in Pacific halibut, Hippoglossus stenolepis, using electronic tags

Biology of the redspotted tonguesole Cynoglossus zanzibarensis (Pleuronectiformes: Cynoglossidae) on the Agulhas Bank, South Africa

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