Reproductive Biology: Issues for Management

Chubb, C. F.

doi:10.1002/9780470698808.ch14

Cited by 43 publications

(77 citation statements)

References 66 publications

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“…The results indicated that ovigerous L. trigonus carry approximately 20,000-100,000 eggs and that the number of eggs in the brood is size dependent. The positive curvilinear relationship ( g. 6) between carapace length and brood fecundity in L. trigonus is similar to those described for other spiny lobsters (Chubb, 1994;Quackenbush, 1994). The broad geographical range that ovigerous and mature lobsters were collected from indicates that L. trigonus is reproductively active along Queensland's east coast between Townsville and Mooloolaba.…”

Section: Discussionsupporting

confidence: 49%

“…The broad geographical range that ovigerous and mature lobsters were collected from indicates that L. trigonus is reproductively active along Queensland's east coast between Townsville and Mooloolaba. Geographical variation in fecundity and size at maturity has been reported in several lobster species (Plaut, 1993;Chubb, 1994;Pollock, 1997;Mori et al, 1998). However, examination of the potential geographical differences in size at maturity and brood fecundity in L. trigonus is this study was not possible due to low sample numbers.…”

Section: Discussionmentioning

confidence: 88%

“…Size at sexual maturity and fecundity are some of the most important life history parameters needed for stock assessment and management of sustainable exploitation levels (Chubb, 1994). These parameters can be used with other population parameter estimates such as growth and mortality to develop yield and egg-per-recruit models.…”

Section: Introductionmentioning

confidence: 99%

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The fishery and reproductive biology of barking crayfish, linuparus trigonus (Von Siebold, 1824) along Queenslands east coast

Haddy¹,

Roy²,

Courtney³

2003

Crustac

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This paper describes the shery and reproductive biology for Linuparus trigonus obtained from trawl shermen operating off Queensland's east coast, Australia. The smallest mature female lobster measured 59.8 mm CL, however, 50% maturity was reached between 80 and 85 mm CL. Brood fecundity (BF) was size dependent and ranged between 19,287 and 100,671 eggs in 32 females from 59.8 to 104.3 mm CL. The relationship was best described by the power equation BF D 0.1107*CL 2:9241 (r 2 D 0:74/. Egg size ranged from 0.96 to 1.12 mm in diameter (mean D 1:02 § 0:01 mm). Egg weight and size were independent of lobster size. Length frequencies displayed multi-modal distributions. The percentage of female to male lobsters was relatively stable for small size classes (30 to 70 mm CL; 50.0 to 63.6% females), but female proportions rose markedly between 75 and 90 mm (72.2 to 85.4%) suggesting that at the onset of sexual maturity female growth rates are reduced. In size classes greater than 95 mm, males were numerically dominant. A description of the L. trigonus shery in Queensland is also detailed. RÉSUMÉCette étude décrit les caractéristiques de pêche et la biologie de la reproduction de Linuparus trigonus, obtenu par les pêcheurs au chalut au large de la côte orientale de Queensland, Australie. La langouste mature femelle la plus petite mesurait 59,8 mm CL, cependant, la maturité à 50% était atteinte pour les animaux mesurant de 80 à 85 mm CL. La fécondité (BF) était dépendante de la taille et comprise entre 19,287 et 100,671 oeufs chez 32 femelles de 59,8 à 104,3 mm CL. La relation a été le mieux exprimée par l'équation BF D 0,1107*CL 2;9241 (r 2 D 0,74). La taille des oeufs variait de 0,96 à 1,12 mm de diamètre (moyenne D 1,02 § 0,01 mm). Le poids et la taille des oeufs n'étaient pas liés à la taille de la langouste. Les distributions de fréquence de longueur ont montré une distribution multi-modale. Le pourcentage des femelles par rapport aux mâles était relativement stable pour les petites classes de taille (30 à 70 mm CL; 50,0 à 63,6% de femelles), mais les proportions de femelles ont augmenté de façon marquée pour les classes de taille de 75 à 90 mm (72,2 à 85,4%), suggérant

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Section: Discussionsupporting

confidence: 49%

Section: Discussionmentioning

confidence: 88%

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The fishery and reproductive biology of barking crayfish, linuparus trigonus (Von Siebold, 1824) along Queenslands east coast

Haddy¹,

Roy²,

Courtney³

2003

Crustac

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“…Directional long-distance migrations have been shown for several Panulirus and Jasus lobster species (P. argus, P. cygnus, P. ornatus, J. edwardsii and J. verreauxi;Chubb 1994). Our study showed a very specific easterly migration pattern for juvenile and small adult Palinurus gilchristi between Cape Agulhas and Mossel Bay to Port Elizabeth (Fig.…”

Section: Discussionmentioning

confidence: 67%

Long-distance migration of South African deep-water rock lobster Palinurus gilchristi

Groeneveld¹,

Branch²

2002

Mar. Ecol. Prog. Ser.

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Long-term movement patterns of deep-water rock lobster Palinurus gilchristi were investigated off the south coast of South Africa using tag recapture data. Over a 12 yr period (1988 to 1999), 30 043 lobsters were tagged at 5 sites. From west to east, these were Cape Agulhas, West and East Agulhas Bank, Mossel Bay to Port Elizabeth, and Port Alfred. The overall recapture rate was 7.51%, with individuals remaining at large for up to 10.3 yr. Overall, 547 (25.8%) tagged lobsters of both sexes moved > 20 km within or between sites. We hypothesized that counter-current migration of juveniles would occur to redress downstream dispersal of phyllosoma larvae by the westerly flowing Agulhas Current. The vast majority of migrants (72.6%) did prove to be immature (carapace length < 72 mm) and did migrate eastwards against the prevailing flow of the Agulhas Current. The Cape Agulhas population (at the western extreme) comprised juveniles only. Over 97% migrated > 50 km, either southeastwards offshore to the West and East Agulhas Bank sites (106 lobsters, covering a mean distance of 154 km), or eastwards alongshore to the Mossel Bay to Port Elizabeth site near the center of the range (33 lobsters, 461 km). The fastest 5% of migrants moved at 0.43 to 0.78 km d -1

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“…Newly matured females of spiny lobsters that repetitively spawn during a single season produce fewer broods than their larger conspecifics (Chubb 2000), with newly matured P. cygnus, P. longipes longipes, and P. guttatus all producing only one batch of eggs during a spawning season (Chubb et al 1994;Gomez & Bermas 1994;Sharp et al 1997). Thus, the fact that the criteria currently in use in this fishery classified a large proportion of small females, i.e., 18% of those below the size at first maturity at Fremantle, as double breeders, indicates that this set of criteria is probably misclassifying a significant proportion of these lobsters.…”

Section: Discussionmentioning

confidence: 99%

Visual assessment of the reproductive condition of female western rock lobsters (Panulirus cygnus)

Melville‐Smith¹,

Lestang²

2005

New Zealand Journal of Marine and Freshwater Research

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An important issue when surveying the reproductive condition of large numbers of female Panulirus cygnus in the field is that each animal must be assessed quickly and accurately on the basis of only a few easily discernable criteria. The four biological criteria most commonly recorded for each lobster are: (1) ovigerous setae condition (not present, partially developed, and fully developed); (2) the presence (unused or eroded) of a spermatophore mass; (3) the presence and developmental stage of external ova; and (4) the visual appearance of the ovaries through the dorso-thoracic musculature. Using the above criteria each female can then be assigned to a reproductive state, i.e., immature, inactive breeder, single breeder, or double breeder. This study compared external assessments with internal cellular development of the ovary (via histology) and elucidated the shortcomings of the external technique. This has resulted in the production of a modified set of criteria that, if applied to samples collected during the peak of the breeding season, enables the breeding state of a female western rock lobster to be more accurately determined in the field without causing it any damage. The height of the breeding season is the optimum time for stock egg production assessment.

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Reproductive Biology: Issues for Management

Cited by 43 publications

References 66 publications

The fishery and reproductive biology of barking crayfish, linuparus trigonus (Von Siebold, 1824) along Queenslands east coast

The fishery and reproductive biology of barking crayfish, linuparus trigonus (Von Siebold, 1824) along Queenslands east coast

Long-distance migration of South African deep-water rock lobster Palinurus gilchristi

Visual assessment of the reproductive condition of female western rock lobsters (Panulirus cygnus)

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