The finding of diamond squid Thysanoteuthis rhombus in the Gulf of Tehuantepec, Northeastern Tropical Pacific

Authors

  • Maria Carmen Alejo-Plata Universidad del Mar, Campus Puerto Ángel. Ciudad Universitaria, Puerto Ángel, Municipio de San Pedro Pochutla, Oaxaca, 70902. México
  • Brian Urbano Facultad de Ciencias, Universidad Nacional Autónoma de México Circuito exterior s/n, Coyoacán, Cd. Universitaria, Ciudad de México, 04510. México http://orcid.org/0000-0002-6688-2005
  • Brian Urbano Universidad Nacional Autónoma de México http://orcid.org/0000-0002-6688-2005

DOI:

https://doi.org/10.24275/uam/izt/dcbs/hidro/2018v28n1/Alejo

Keywords:

Cephalopoda, Gulf of Tehuantepec, Thysanoteuthis rhombus

Abstract

Background. The presence of Thysanoteuthis rhombus Troschel, 1857 in the eastern Pacific Ocean was estimated based on the geographic range of the species constructed from scattered locations of adults, juveniles, and egg masses. Goals. This note describes morphometric characteristics of the southernmost registry of the diamond squid T. rhombus in Mexican waters of the Gulf of Tehuantepec (16°N-95°W). Methods. In January 2015 we found a stranded adult female weighing a total of 12.5 kg, with a total length of 92 cm, and a mantle length of 45.5 cm. Results. This was a mature female, with oocytes inside the oviducts that averaged 1.2 mm in diameter, and seven attached spermatophores on the buccal membrane of the female, as evidence of mating. Conclusions. This late registry in the Gulf of Tehuantepec could simply be due to their relative scarcity in the eastern Pacific Ocean.

 

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Author Biographies

Maria Carmen Alejo-Plata, Universidad del Mar, Campus Puerto Ángel. Ciudad Universitaria, Puerto Ángel, Municipio de San Pedro Pochutla, Oaxaca, 70902. México

C. a Dr. Brian Urbano Alonso, Profesor de asignatura A, Departamentos de biología Evolutiva y Comparada, Facultad de Ciencias, UNAM.

Brian Urbano, Facultad de Ciencias, Universidad Nacional Autónoma de México Circuito exterior s/n, Coyoacán, Cd. Universitaria, Ciudad de México, 04510. México

C. a Dr., profesor de asignatura A, departamentos de biología evolutiva y comparada, Facultad de Ciencias, UNAM

Brian Urbano, Universidad Nacional Autónoma de México

C. a Dr., profesor de asignatura A, departamentos de biología evolutiva y comparada, Facultad de Ciencias, UNAM

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Published

2018-05-30

How to Cite

Alejo-Plata, M. C., Urbano, B., & Urbano, B. (2018). The finding of diamond squid Thysanoteuthis rhombus in the Gulf of Tehuantepec, Northeastern Tropical Pacific. HIDROBIOLÓGICA, 28(1), 147–150. https://doi.org/10.24275/uam/izt/dcbs/hidro/2018v28n1/Alejo

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Nota Científica