Rapid Reproductive Analysis and Length–Weight Relation for Blacktail Snapper, &lt;I&gt;Lutjanus Fulvus&lt;/I&gt; (Actinopterygii: Perciformes: Lutjanidae), from a Remote Village in Papua New Guinea

Longenecker, Ken; Langston, Ross; Bolick, Holly; Kondio, Utula

doi:10.3750/aip2013.43.1.07

Cited by 8 publications

(10 citation statements)

References 13 publications

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“…Our macroscopic evaluations were incorrect (wrong sex and/or reproductive status) for 62.6% of N. isacanthus specimens examined. Similar differences between histological and macroscopic results have been reported previously (Vitale et al 2006, Grandcourt et al 2011, Longenecker et al 2013a, 2013c. Although Mackie and Lewis (2001) report that accuracy of macroscopic staging improves as personnel gain experience, they also state that misclassification rate exceeds 40% for many gonad stages, even when workers are experienced.…”

Section: Discussionsupporting

confidence: 54%

“…We disagree. Using the simplified methods we have described (Longenecker et al 2013a(Longenecker et al , 2013b(Longenecker et al , 2013c(Longenecker et al , 2014 histological analysis is fast and economical. Longenecker et al (2013a) estimated the cost of consumable supplies at $1.45 US per specimen.…”

Section: Discussionmentioning

confidence: 99%

“…Visual (macroscopic) examination of gonads results in misclassification of sex and/or reproductive status in 43%-47% of specimens (Longenecker et al 2013a(Longenecker et al , 2013c. These misclassifications tend to overestimate the number of mature females (Longenecker et al 2013a(Longenecker et al , 2013c, underestimate female size-at-maturity (Grandcourt et al 2006(Grandcourt et al , 2011, and overestimate female spawning biomass (Vitale et al 2006). Additionally, histological analysis is required to diagnose sex change (Sadovy and Shapiro 1987).…”

Section: Introductionmentioning

confidence: 99%

“…The FishBase life history tool (Froese and Pauly 2016), built on the empirical relations of Froese and Binohlan (2000), increasingly overestimates female size-at-maturity as the maximum size of a species increases (Longenecker et al, 2013b, Longenecker and. Visual (macroscopic) examination of gonads results in misclassification of sex and/or reproductive status in 43%-47% of specimens (Longenecker et al 2013a(Longenecker et al , 2013c. These misclassifications tend to overestimate the number of mature females (Longenecker et al 2013a(Longenecker et al , 2013c, underestimate female size-at-maturity (Grandcourt et al 2006(Grandcourt et al , 2011, and overestimate female spawning biomass (Vitale et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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Rapid reproductive analysis and length–weight relations for five species of coral-reef fishes (Actinopterygii) from Papua New Guinea: Nemipterus isacanthus, Parupeneus barberinus, Kyphosus cinerascens, Ctenochaetus striatus (Perciformes), and Balistapus undulatus (Tetraodontiformes)

Longenecker¹,

Langston²,

Bolick³

et al. 2017

Acta Ichthyol. Piscat.

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T. 2017. Rapid reproductive analysis and length-weight relations for five species of coral-reef fishes (Actinopterygii) from Papua New Guinea: Nemipterus isacanthus, Parupeneus barberinus, Kyphosus cinerascens, Ctenochaetus striatus (Perciformes), and Balistapus undulatus (Tetraodontiformes). Acta Ichthyol. Piscat. 47 (2): 107-124.Background. We present length-weight relations (LWR) and describe the reproductive biology of five species of coral reef fishes from Papua New Guinea (PNG). Each of these species are targeted by artisanal-and smallscale commercial fisheries throughout the country. As such the purpose of this study was to provide baseline reproductive information that can be used for future evaluation and management of the fishery. Materials and methods. We used recently developed methods for rapid, low-cost, on-site, histology-based reproductive analysis that requires minimal research infrastructure. These methods use standard techniques (e.g., plastic embedding) that have been modified such that work can be conducted in remote field settings without electrical service. We studied the following fish species: the teardrop threadfin bream, Nemipterus isacanthus (Bleeker, 1873); the dash-and-dot goatfish, Parupeneus barberinus (Lacepède, 1801); the blue sea chub, Kyphosus cinerascens (Forsskål, 1775); the striated surgeonfish, Ctenochaetus striatus (Quoy et Gaimard, 1825); and the orange-lined triggerfish, Balistapus undulatus (Park, 1797). Results. In all species, length was an approximately cubic function of weight. Female B. undulatus mature at a smaller size than males; in the other four species males mature at a smaller size. Nemipterus isacanthus, K. cinerascens, C. striatus, and B. undulatus are gonochores. Females are rare or absent in the largest size classes of N. isacanthus, P. barberinus, C. striatus, and B. undulatus. For P. barberinus and B. undulatus, size classes well below maximum observed size are responsible for the majority of egg production. Conclusion. Our results differed markedly from those of macroscopic and data-deficient approaches and may help to avoid unnecessary management actions. Further, an emergent pattern challenges a current paradigm in reef-fish conservation and management; contrary to a general assumption for many reef-fish species, the largest ACTA ICHTHYOLOGICA ET PISCATORIA (2017) 47 (2): 107-124

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Section: Discussionsupporting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rapid reproductive analysis and length–weight relations for five species of coral-reef fishes (Actinopterygii) from Papua New Guinea: Nemipterus isacanthus, Parupeneus barberinus, Kyphosus cinerascens, Ctenochaetus striatus (Perciformes), and Balistapus undulatus (Tetraodontiformes)

Longenecker¹,

Langston²,

Bolick³

et al. 2017

Acta Ichthyol. Piscat.

Self Cite

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show abstract

“…We use recently developed methods for rapid, low-cost, on-site, histologybased reproductive analysis that requires minimal research infrastructure (Longenecker et al 2013a(Longenecker et al , 2013b. These methods use standard techniques (e.g., plastic embedding) that have been modified such that work can be conducted in remote field settings without electrical service.…”

mentioning

confidence: 99%

Rapid reproductive analysis and length–weight relation for red-bellied fusilier, Caesio cuning, and longfin emperor, Lethrinus erythropterus (Actinopterygii: Perciformes: Caesionidae and Lethrinidae) from a remote village in Papua New Guinea

Longenecker¹,

Langston²,

Bolick³

et al. 2014

Acta Ichthyol. Piscat

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One of the most easily understood concepts in fishery management and conservation is to harvest individuals only after they have grown large enough to reproduce, thus allowing each generation to "seed" the next (Froese 2004). However the concept is difficult to put into practice because basic reproductive information such as size at maturity is lacking for~83% of exploited species worldwide (Froese and Binohlan 2000). This problem is especially intractable for coral-reef fishes; their sheer diversity, and the supposed cost associated with the reproductive analysis of each species are often cited as barriers to obtaining this important information (Roberts and Polunin 1993, Johannes 1998). Further, many Pacific island nations, where many of the world's coral reefs are located, have little or no capacity to conduct the reproductive research needed to support fishery management and conservation (Dalzell 1998). The reason for the latter problem may be as simple as a lack of basic infrastructure (e.g., electrical service needed to operate laboratory equipment) in many parts of these developing countries.To address these issues, and as part of a larger marineconservation effort (see Longenecker et al. 2013c), we initiated a research program to generate reproductive information for Pacific coral-reef fishes. We use recently developed methods for rapid, low-cost, on-site, histologybased reproductive analysis that requires minimal research infrastructure (Longenecker et al. 2013a(Longenecker et al. , 2013b. These methods use standard techniques (e.g., plastic embedding) that have been modified such that work can be conducted in remote field settings without electrical service. With these methods, reproductive information can be generated quickly and at low cost, thus eliminating for all specimens, but the length-weight relation differs between sexes. We estimate minimum size-at-maturity for males at 19.2 cm FL, and female L 50 at 20.4 cm FL. Overall sex ratio of mature individuals is not significantly different from 1 : 1; however sex-ratio does vary with length. Males dominate size classes > 21 cm. The species is a batch-spawning, protogynous hermaphrodite. RAPID REPRODUCTIVE ANALYSIS AND LENGTH-WEIGHT RELATION FOR RED-BELLIED FUSILIER, CAESIO CUNING, AND LONGFIN EMPEROR, LETHRINUS ERYTHROPTERUS (ACTINOPTERYGII: PERCIFORMES: CAESIONIDAE AND LETHRINIDAE) FROM

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Length–Weight and Length-Length Relationships, and Seasonal Condition Factors of Blueline Snapper, Lutjanus coeruleolineatus (Rüppell, 1838) from Salalah Coast, Sultanate of Oman

et al. 2021

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Rapid Reproductive Analysis and Length–Weight Relation for Blacktail Snapper, <I>Lutjanus Fulvus</I> (Actinopterygii: Perciformes: Lutjanidae), from a Remote Village in Papua New Guinea

Cited by 8 publications

References 13 publications

Rapid reproductive analysis and length–weight relations for five species of coral-reef fishes (Actinopterygii) from Papua New Guinea: Nemipterus isacanthus, Parupeneus barberinus, Kyphosus cinerascens, Ctenochaetus striatus (Perciformes), and Balistapus undulatus (Tetraodontiformes)

Rapid reproductive analysis and length–weight relations for five species of coral-reef fishes (Actinopterygii) from Papua New Guinea: Nemipterus isacanthus, Parupeneus barberinus, Kyphosus cinerascens, Ctenochaetus striatus (Perciformes), and Balistapus undulatus (Tetraodontiformes)

Rapid reproductive analysis and length–weight relation for red-bellied fusilier, Caesio cuning, and longfin emperor, Lethrinus erythropterus (Actinopterygii: Perciformes: Caesionidae and Lethrinidae) from a remote village in Papua New Guinea

Length–Weight and Length-Length Relationships, and Seasonal Condition Factors of Blueline Snapper, Lutjanus coeruleolineatus (Rüppell, 1838) from Salalah Coast, Sultanate of Oman

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