Length-weight relationship in ten fish species from the Nhamundá River, the Amazon Basin, Brazil

Freitas, Tiago Magalhães da Silva; Souza, Joao Batista de Souza e; Prudente, Bruno da Silveira; Montag, Luciano Fogaça de Assis

doi:10.1590/1809-4392201601272

Cited by 24 publications

(26 citation statements)

References 13 publications

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“…However this difference falls within expected values found for several freshwater Neotropical species (Giarrizzo et al, 2011;Freitas et al, 2017). The LWR variation can be associated with particular populations, and with season and annual changes in environmental conditions (Froese, 2006).…”

Section: Discussionsupporting

confidence: 85%

Wide reproductive period of a long-distance migratory fish in a subtropical river, Brazil

et al. 2017

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Salminus brasiliensis is a potamodromous fish species that occurs in southern South American rivers. In spite of its ecological and economic relevance, information regarding the reproductive biology of S. brasiliensis is still scarce. This study used data from 18 years of continuous sampling in the Upper Uruguay River Basin, analyzing 718 adult fish (307 males, 243 females, 168 undefined) captured at different months of the year. The results showed that the reproductive timing for S. brasiliensis is wide in the Upper Uruguay River, with the occurrence of mature fish between the month of August and March and spawned individuals between July and May of the next year. These results were sustained by the increase of gonadal somatic relationship (GSR) from August. The reproductive timing of S. brasiliensis in the Upper Uruguay River may start between the middle winter and early spring (from late July to late September), and may extend until the late summer and middle fall (from the middle February to early May). These findings contribute to information on the general biology of S. brasiliensis and provide valuable knowledge to management programs and to conservation efforts of this fisheries resource.

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Section: Discussionsupporting

confidence: 85%

Wide reproductive period of a long-distance migratory fish in a subtropical river, Brazil

et al. 2017

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“…Curimatopsis melanura was collected in an unnamed tributary of the Rio Nhamundá, a left bank river basin between the Rio Urubu and Rio Trombetas in the middle Rio Amazonas. The stretch has clear water and drains lowland Amazon rainforest nearly 40 m above sea level within the Floresta Estadual de Faro (Ávila‐Pires et al, ; Freitas et al, ). The ichthyofauna of the Rio Nhamundá is poorly known, with Collins et al .…”

Section: Discussionmentioning

confidence: 99%

A new species of Curimatopsis Steindachner (Characiformes: Curimatidae) from the Rio Nhamundá, Amazon basin

Dutra

Melo

Netto‐Ferreira

2018

Journal of Fish Biology

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A new species of Curimatopsis is described from the Rio Nhamundá, Amazon basin in northern Brazil. The new species is distinguished from congeners by the presence of a distinctive concentration of dark pigmentation over the entire lower lobe of the caudal fin, reticulate pattern of body pigmentation, lower jaw longer than and overlapping the anterior portion of the upper jaw, crescent-shaped posterior nostril and by morphometric and meristic data. Comments on the phylogenetic position of the new species within Curimatopsis are also provided.

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“…Nilai panjang karapas lobster pertama kali tertangkap (CL c ) diperoleh melalui pendekatan fungsi logistik dengan persamaan Sparre & Venema, (1992 Parameter "a" adalah koefisien proporsionalitas untuk berat terhadap panjang karapas lobster dan "b" adalah koefisien untuk bentuk tubuh (Freitas et al, 2017). Nilai koefisien "b" setiap spesies berkisar antara 2.5 -3.5 (Froese, 2006).…”

Section: Analisis Dataunclassified

DISTRIBUSI UKURAN PANJANG DAN PARAMETER POPULASI LOBSTER LUMPUR (Panulirus polyphagus Herbst, 1793) DI PERAIRAN SEBATIK, KALIMANTAN UTARA (WPPNRI-716)

Chodrijah

Priatna

Nugroho³

2018

JURNAL PENELITIAN PERIKANAN INDONESIA

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Sumberdaya udang barong lumpur (Panulirus polyphagus Herbst, 1793) atau dalam bahasa lokal dikenal sebagai lobster Pakistan telah dimanfaatkan sebagai salah satu komoditas yang bernilai ekonomis di perairan pulau Sebatik, Kalimantan Utara. Data statistik perikanan menunjukkan produksi udang barong di perairan Timur Kalimantan tahun 2005 – 2015 meningkat pesat dengan kelipatan 10 kalinya. Terkait dengan fenomena tersebut, penelitian tentang aspek biologi populasi telah dilakukan pada bulan Maret sampai dengan November 2016. Penelitian ini bertujuan untuk mendapatkan parameter populasi sebagai landasan untuk mengetahui status stok pada tingkat pemanfaatan terkini. Hasil penelitian menunjukkan udang betina tertangkap pada ukuran rata-rata 86,9+ 8,58 mmCL sedangkan udang jantan pada ukuran 81,5 + 9,63 mmCL. Pola pertumbuhan udang jantan dan betina bersifat allometrik negatif (b<3). Estimasi panjang asimtotis (CL) sebesar 124,1 mm dengan laju pertumbuhan (K) 0,598/tahun. Rata-rata ukuran pertama tertangkap (CLc) adalah 84,5 mmCL. Nilai tersebut lebih rendah dari pertama kali matang gonad (CLm) sebesar 90,74 mmCL. Laju kematian total (Z) sebesar 2,26/tahun, laju kematian alamiah (M) 0,87/tahun serta laju kematian akibat penangkapan (F) 1,39/tahun. Estimasi laju eksploitasi cenderung mengarah kepada penangkapan berlebih (E = 0,61), oleh karena itu perlu dilakukan tindakan pengelolaan melalui pendekatan pengendalian upaya penangkapan dan pembatasan ukuran minimum yang boleh ditangkap. Mud spiny lobster (Panulirus polyphagus Herbst, 1793) or locally known as Pakistan lobster has been exploited as an important economic species in the waters of Sebatik Island, North Kalimantan. The best available capture fisheries statisticon 2005-2015 indicates the production of marine lobster were significantly increased by 10. Based on this phenomenon, observations on biological aspects were carried out during period of March to November 2016. The aim of this study were to estimate of stock status under existing fisheries condition. The result showed that the average size of females was 86.9+ 8.58 cmCL and males was 81.5 + 9.63 mmCL. The growth pattern indicates allometric negative (b<3). Population parameter performed by length based analysis indicates that asymptotic length (CL) was 124.1 mmCL with growth rate (K) of 0.598/yr.The average size of first capture (Lc) was estimated at 84.5 mmCL. This value was less than average size of first mature (CLm) of 90.7 cmCL.The predicted annual total mortality rates (Z) was 2.26/yr, the natural mortality (M) was 0.87/yr, and fishing mortalities (F) was 1.39/yr. The exploitation rates (E) of 0.61 tend to be beyond the sustainable exploitation level. To reduce the fishing mortality, the initiative of specific local management plan on restructuring active fleet and establishing minimum legal size should be implemented.

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Length-weight relationship in ten fish species from the Nhamundá River, the Amazon Basin, Brazil

Cited by 24 publications

References 13 publications

Wide reproductive period of a long-distance migratory fish in a subtropical river, Brazil

Wide reproductive period of a long-distance migratory fish in a subtropical river, Brazil

A new species of Curimatopsis Steindachner (Characiformes: Curimatidae) from the Rio Nhamundá, Amazon basin

DISTRIBUSI UKURAN PANJANG DAN PARAMETER POPULASI LOBSTER LUMPUR (Panulirus polyphagus Herbst, 1793) DI PERAIRAN SEBATIK, KALIMANTAN UTARA (WPPNRI-716)

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