Habitat use and abundance of goliath grouper Epinephelus itajara in Brazil: a participative survey

Giglio, Vinicius J.; Adelir‐Alves, Johnatas; Gerhardinger, Leopoldo Cavaleri; Grecco, Fabiano C.; Daros, Felippe Alexandre; Bertoncini, Áthila Andrade

doi:10.1590/1982-0224-20130166

Cited by 13 publications

(12 citation statements)

References 27 publications

(32 reference statements)

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“…The control region was amplified in a total reaction volume of 12.5 µL: 1X of Taq DNA polymerase buffer (200 mM Tris-HCl, pH 8.4, and 500 mM of KCl), 1.5 mM of MgCl 2 , 0.2 mM of dNTP, 1 unit of Taq DNA polymerase enzyme buffer (PHT Phoneutria ® ), 10 ng/µL of DNA and 0.2 µM of the primers. The control region primers were L-Pro-1 (5'-ACT CTC ACC CCT AGC TCC CAA AG -3') and H-DL-C-1 (5'-CCT GAA GTA GGA ACC AGA TGC CAG -3') described by itajara (Giglio et al 2014). Ostellari et al (1996).…”

Section: Dna Extraction Amplification and Sequencingmentioning

confidence: 99%

“…These oscillations probably hampered the colonization process and may have resulted in the formation of barriers to the dispersal of pelagic larvae in the region of the Abrolhos Ridge in Bahia, in particular on the inner continental shelf through the formation of effective hydrodynamic and geological barriers (Leipe 1999) and the reversion of currents (Teixeira et al 2013), which would have retained the larvae at the mouth of the Caravelas River, in southern Bahia. Interactions between small (1-10 individuals) resident breeding groups (Giglio et al 2014) in areas favourable to larval retention may result in reduced gene flow and greater differentiation among populations.…”

Section: Population Structuringmentioning

confidence: 99%

“…A recent study of E. itajara on the Brazilian coast (Giglio et al 2014) identified local and resident breeding groups, which point to the possibility of the formation of local, temporary populations. The aim of the present study was to evaluate gene flow using a portion of the genome (mitochondrial control region) subject to more accelerated molecular evolution (Tang et al 2006) to determine signs of heretofore unrecognized E. itajara population divisions.…”

Section: Introductionmentioning

confidence: 99%

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Mitochondrial DNA evidences reflect an incipient population structure in Atlantic goliath grouper (<em>Epinephelus itajara</em>, Epinephelidae) in Brazil

Damasceno¹,

Siccha-Ramírez²,

Morales³

et al. 2015

Sci. Mar.

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Summary:The Atlantic goliath grouper is a critically endangered species that inhabits estuarine and reef environments and is threatened primarily by fishing activities and habitat destruction. Despite the urgent need for protection, its genetic conservation status remains unknown. The aim of the present study was to evaluate the gene flow among the populations of the species along the coast of Brazil based on the control region of the mitochondrial DNA. The results indicate low haplotype diversity (0.40-0.86) and very low nucleotide diversity (0.1-0.5%). They also show that the genetic diversity of the species varies considerably along the coast and that this finding may be especially important for the identification of priority areas for its conservation. The population analyses indicate a low but significant degree of genetic structuring (Φ ST =0.111), probably due to the occurrence of rare haplotypes at some locations, although the genetic differentiation between sites was not correlated with geographic distance (r=0.0501; p=0.7719), and the shared haplotypes indicate that gene flow occurs among all locations along the Brazilian coast. The results of the pairwise F ST indicate a high degree of genetic differentiation between locations. The incipient population structuring detected in the present study is not related systematically to the geological or physical features of the Brazilian coast. The complex interaction of fluctuations in sea level, marine currents, and the reproductive characteristics of the species hampers the identification of the specific role of each of these processes in the gene flow dynamics of the population units of the Atlantic goliath grouper. The low overall levels of genetic diversity, the pairwise F ST values and the significant population structuring among groups (Φ CT ) identified in the present study all reinforce the critically endangered status of the species and are inconsistent with the presence of a single, panmictic population of groupers on the Brazilian coast. The results of this study suggest that, though it may be incipient, the observed genetic structuring must be taken into account in order to prevent potential problems, such as outbreeding depression, in the management of wild stocks.Keywords: critically endangered species; gene flow; genetic diversity; marine fish; western Atlantic Ocean.Evidencias en el ADN mitocondrial reflejan una incipiente estructuración poblacional en el mero guasa del Atlántico (Epinephelus itajara, Epinephelidae) en Brasil Resumen: El mero guasa del Atlántico está críticamente en peligro, habita en ambientes estuarinos y arrecifes, los cuáles están amenazados principalmente por las actividades de pesca y la destrucción de su hábitat. A pesar de la necesidad urgente de protección, su estado de conservación genética aún es desconocido. El objetivo del presente estudio fue evaluar el flujo génico entre las poblaciones de esta especie a lo largo de la costa de Brasil analizando la variabilidad genética de la región control del ADN mitocondrial....

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Section: Dna Extraction Amplification and Sequencingmentioning

confidence: 99%

Section: Population Structuringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mitochondrial DNA evidences reflect an incipient population structure in Atlantic goliath grouper (<em>Epinephelus itajara</em>, Epinephelidae) in Brazil

Damasceno¹,

Siccha-Ramírez²,

Morales³

et al. 2015

Sci. Mar.

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“…Hasil penelitian Heyman et al (2004) menunjukkan beberapa ikan kerapu menjelang dewasa diduga memasuki tahap pemijahan biasanya berkumpul atau beragregasi pada kedalaman ±10-15 meter atau berkumpul di tempat yang kecerahannya rendah (agak gelap) dan intensitas cahaya yang masuk ke dalam air sedikit. Giglio et al (2014) dalam penelitianya tentang kelimpahan dan habitat ikan kerapu di Brazil ditemukan 63% (dari n = 222) berada pada perairan dangkal (0-14 meter), hasil analisis terhadap ikan kerapu dewasa berada pada kedalaman rata-rata 22,3 m (± 6,7 sd), sedangkan remaja dan sub-adults yang diamati pada kedalaman ratarata 18 m (± 7.48 sd). Faktor lain yang dapat mempengaruhi pemijahan agregasi, yaitu parameter lingkungan perairan lainnya, karena hal ini diduga berpengaruh langsung pada penentuan penyebaran larva ikan.…”

Section: Keeratan Habitat Spawning Aggregation Ikan Kerapuunclassified

Karakteristik Habitat Ikan Kerapu Di Kepulauan Karimun Jawa, Jawa Tengah

Mujiyanto

Syam

2015

BAWAL Widya Riset Perikanan Tangkap

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Perairan Kepulauan Karimunjawa merupakan pemasok ikan kerapu bagi wilayah Pantai Utara Jawa. Permintaan dan harga pasar yang sangat tinggi mendorong nelayan lebih intensif dalammelakukan penangkapan ikan kerapu. Kegiatan penangkapan ikan kerapu selama ini dilakukan pada malam hari dengan alat bantu kompresor dan tembak. Kegiatan tersebut merupakan salah satu usaha untuk mendapatkan jumlah tangkapan yang tinggi tanpa memperhatikan kelestarian habitat dasar perairannya. Penelitian bertujuan untukmengetahui keeratan hubungan ikan kerapu dengan karakteristik habitatnya. Metode yang digunakan adalah deskriptif eksploratif. Penelitian dilaksanakan selama 3 tahun (2011; 2012 dan 2013), waktu sampling masing-masing tahun penelitian berdasarkan musim. Pengamatan visual sensus sepanjang garis transek pada dua kedalaman 5-6 m dan 10-11 m. Hasil penelitian menunjukkan habitat ikan kerapu pada kedalaman ±5-6 meter adalah non karang serta substrat mati lainnya. Selain itu, ikan-ikan kerapu cenderung bergerak ke perairan yang lebih dalam. Karakteristik habitat pada kedalaman ±10-11 meter menunjukkan ikan kerapu lebih menyukai dasar perairan dengan habitat karang keras yang didominasi oleh gundukan karangmassive yang membentuk celah atau lubang lubang. Perilaku ikan kerapu bergerak dan berpasangan di tempat yang agak gelap (rendah visibilitas) dengan intensitas cahaya yang rendah. Perbedaan habitat kehidupan ikan kerapu pada kedalaman 5-6 dan 10-11 meter adalah dominasi karang jenis Pavona sp dengan tingkat visibilitas perairan yang rendah.Karimunjawa Islands is a supplier of grouper fish for the north coast of Java. Grouper fishing activities have been carried out fishing done at night with a compressor and shooting aids. Fishing activity is an effort to get the number of catches were high regardless habitat resources of waters. The research aims to determine the correlation grouper fish with habitat characteristics. Method be used is descriptive exploratory method. The research was done in over three years (2011; 2012 and 2013), each sampling of research based on season time. The observations visual census along on line transect at two depths (± 5-6 and ± 10-11 meters). The results showed that habitat in depth ± 5-6 meters, that grouper fish was found in non-reef habitats and other death substrates, as well as show grouper fish tend to move to deeper waters. Characteristics habitats in a depth of ±10-11 meters prefers bottom waters with hard coral habitats with dominated by massive coral mounds are a lot of gaps or holes. Behavior grouper fish move and paired witha low visibility (low intensity of light). Differences habitats of grouper fish life in depth ± 5-6 and ± 10-11 meters is coral dominated by Pavona sp and low visibility of water level.

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“…Aggregations are known to occur on high-relief reefs, especially on artificial structures that provide shelter and food EKLUND, 1999;MANN et al, 2009). In Brazil, artificial reefs generally attract higher abundances of goliath grouper than do the natural ones (SIMON et al, 2011;GIGLIO et al, 2014b). Sites were related to coastal areas relatively close to large estuaries and mangrove areas, which are essential settlement sites for goliath grouper larvae and as nursery habitats for juveniles EKLUND, 1999;KOENIG et al, 2007).…”

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confidence: 99%