LARVAL DEVELOPMENT OF THE MOTE SCULPIN (Normanichthys crockeri) (PISCES:NORMANICHTHYIDAE) FROM THE INDEPENDENCIA BIGHT, PERÚ.


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jvelez [ at ] awi-bremerhaven.de

Abstract

A developmental series of Larvae of Normanichthys crockeri from Bahia Independencia (Perú) is described and illustrated. 3124 specimens were collected with plankton nets at four stations in 2000 at Independencia Bight. 66 individuals (1.88-20.5 mm) from new hatched larvae through transformation were assembled using general morphological features including body length, snout-anus length, body depth, head and snout length, eye diameter, pectoral and pelvic fin length, formation of the caudal complex, and pigmentation patterns. Normanichthys crockeri larva hatch at approximately 1.8 mm. Notochord flexion begins at ca. 7.0 mm and ends at ca. 9.0 mm, transformation begins at ca. 16.0 mm and is completed.at 20.0-21.00 mm BL. The most important diagnostic features of the larvae include early development of large lightly pigmented pectoral fins, early dorsal midline pigment which decreases gradually with development until the beginning of the flexion stage and does not reappear until the end of postflexion stage. This species is moderately slender with a preanal length roughly half of the body length (ca. 40-53% BL), and has I,5 pelvic fin rays, 7+6 principal caudal fin rays, and 36-37 myomeres.



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26th Annual larval Fish Conference 22-26 July 2002-Bergen, Norway..
Eprint ID
7594
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Velez, J. (2002): LARVAL DEVELOPMENT OF THE MOTE SCULPIN (Normanichthys crockeri) (PISCES:NORMANICHTHYIDAE) FROM THE INDEPENDENCIA BIGHT, PERÚ. , 26th Annual larval Fish Conference 22-26 July 2002-Bergen, Norway. .


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