Morphometric analysis on sagitta, asteriscus and lapillus of Shortnose Mojarra Diapterus brevirostris (Teleostei: Gerreidae) in Cuyutlan coastal Lagoon, Colima, Mexico

Abstract

Análisis morfométrico de la sagitta, el asteriscus y el lapillus de la mojarra malacapa Diapterus brevirostris (Teleostei: Gerreidae) de la laguna costera de Cuyutlán, Colima, MéxicoManuel Resumen.-Se estudiaron la morfología, la morfometría y los anillos de crecimiento de los otolitos: sagitta, asteriscus y lapillus de Diapterus brevirostris de la laguna de Cuyutlán, Colima, México. Las muestras se obtuvieron de la captura comercial de abril 2010 a julio 2012. Se analizaron las diferencias entre derecho e izquierdo y entre sexos de los tres pares de otolitos. Las relaciones entre la longitud total del pez y la longitud y anchura del otolito mostraron que estas estructuras pueden utilizarse para determinar la edad en los peces. En todos los casos se observó que el crecimi ento en los otolitos es excéntrico con respecto al núcleo. Se identificaron 6 anillos de crecimiento en las sagittae y en los asterisci. Debido a su grosor, estas marcas no se observaron en los lapilli. El crecimiento de las sagittae y los lapilli es mayor en machos que en hembras en el intervalo de clases de tallas de 160 a 320 mm de longitud total. Sin embargo, se observó que el crecimiento de los asterisci es mayor en hembras que en machos en las tallas de 180 a 320 mm. Palabras clave: Otolitos, anillos de crecimiento, determinación de edad, Diapterus brevirostrisAbstract.-Morphology, morphometry and growth rings of the otoliths: sagitta, asteriscus and lapillus of Diapterus brevirostris from Cuyutlán Lagoon in Colima, Mexico were studied. The samples were obtained from the commercial catch from April 2010 to July 2012. Right and left and sex differences of the three pairs of otoliths were analyzed. Relations between total length of the fish and length and width of the otolith showed that these structures can be used to determine age in fish. Growth in otoliths is eccentric according to the core in all cases. Six growth rings were identified in sagittae and asterisci. These marks could not be seen in lapilli because of the thickness of this structure. Growth of sagittae and lapilli is faster in males than females of 160 to 320 mm total length. Nonetheless, it was observed that growth in asterisci is faster in females than in males of 160 to 320 mm.

Study of the Age of Centropomus robalito by Otoliths Analysis of sagitta, asteriscus and lapillus in Mexican Central Pacific

“…The glossary terminology of Secor et al [10], was used to describe the labyrinth system and the sagittae of this species. In the case of the asterisci and lapilli, similar concepts were used for description as in Gallardo-Cabello et al [11][12][13][14][15][16][17], and Espino-Barr et al [18][19][20][21].…”

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“…However, in the previous study, the linear relationship between fish length and the length of otoliths was not evaluated, but their approach considered the otolith length a depended variable (Rivera-Felix et al 2013: Figure 2A, 2B, 2C, 2D, 2E). Gallardo-Cabello et al (2014) and Espino-Barr et al (2015) used the relationship between fish length and otolith length in the short-nosed mojarra D. brevirostris and the yellowfin mojarra G. cinereus to determine the age and growth, respectively. However, their data on length-length relationships are not comparable with the results of the present work because the otoliths were estimated in mm and fish length in cm.…”

“…To the best of our knowledge, the relationships between size parameters in fish and otolith length for species of the Gerreidae family that inhabit the coast of Mexico have not been investigated, except for three species: the Irish mojarra Diapterus auratus Ranzani 1842, the short-nosed mojarra D. brevirostris (Sauvage 1879), and the yellowfin Mojarra Gerres cinereus (Walbaum 1792) (Rivera-Félix et al 2013;Gallardo-Cabello et al 2014;Espino-Barr et al 2015, respectively). In contrast, these relationships have been examined in other fish families (e.g., AuriolesGamboa, 1992;Espino-Barr et al 2013).…”

Indeks bentuk otolit ikan cakalang, Katsuwonus pelamis (Linnaeus, 1758) dari Samudra Hindia

“…Ikan bertulang sejati (Teleostei) mempunyai otolit yang terletak di dalam telinga sehingga otolit seringkali disebut juga batu telinga (Jawad et al 2011, Chulin & Chen 2013. Otolit merupakan organ yang ber-fungsi untuk mengatur keseimbangan, pendengaran, koordinasi arah renang, dan orientasi (Tuset et al 2003, Popper et al 2005, Bani et al 2013, Cabello et al 2014, Yilmaz et al 2014, Sadighzadeh et al 2014 yang ditemukan pada semua ikan bertulang sejati (Campana 2004). Otolit tersusun dari kalsium karbonat (CaCO3) sebagai komponen utama, _____________________________ Penulis korespondensi Alamat surel: arief_wujdi@yahoo.com Jurnal Iktiologi Indonesia yang umumnya berbentuk aragonit dan deposit garam (Valinassab et al 2012, Cabello et al 2014, Sadighzadeh et al 2014.…”