Preliminary analysis of the feeding habits of batoids from the genera &lt;i&gt;Mobula&lt;/i&gt; and &lt;i&gt;Myliobatis&lt;/i&gt; in Northern Peru

Coasaca-Céspedes, Javier Jesús; Segura‐Cobeña, Eduardo; Montero-Taboada, Rebeca; González-Pestana, Adriana; Alfaro-Córdova, Eliana; Alfaro‐Shigueto, Joanna; Mangel, Jeffrey C.

doi:10.22370/rbmo.2018.53.3.1368

Cited by 10 publications

(8 citation statements)

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“…La dieta de R. velezi ha sido estudiada en Colombia, Costa Rica y México (Navia et al 2007, Espinoza et al 2012, Simental 2013, donde se ha encontrado que en la dieta predominan presas demersales, principalmente los crustáceos decápodos y los peces pequeños. En el Perú, existen muy pocos estudios sobre la dieta de batoideos (Coasaca-Céspedes et al 2018, Silva-Garay et al 2018) y ningún estudio sobre la dieta de la raya bruja. Es importante conocer la alimentación de este grupo poco estudiado.…”

Section: Study Area and Sampling Methodologyunclassified

“…The diet of R. velezi has been studied in Colombia, Costa Rica, and Mexico (Navia et al 2007, Espinoza et al 2012, Simental 2013, wherein demersal prey were found to prevail, mainly decapod crustaceans and small fish. In Peru, there are very few studies about the diet of batoids (Coasaca- Céspedes et al 2018, Silva-Garay et al 2018, and there are no studies regarding the diet of the rasptail skate. It is important to learn the feeding habits of this little-studied taxonomic group.…”

Section: Introductionmentioning

confidence: 99%

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Diet of the rasptail skate, Rostroraja velezi (Rajiformes: Rajidae), off Piura, Peru

Molina-Salgado¹,

Alfaro‐Shigueto²,

González-Pestana³

2021

Cienc. Mar.

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Batoids are among the least studied group of vertebrates and one of the most vulnerable to fishing. The rasptail skate, Rostroraja velezi, is a bycatch species in northern Peru for which there are no studies on its diet. This research aims to document the diet of R. velezi on the northern Peruvian coast and to determine if there are sex-based differences in the diet. A total of 74 R. velezi stomachs were collected, 59 of which had stomach contents. The cumulative prey curve showed reliability in the number of samples collected. According to the prey-specific index of relative importance, diet was dominated by Acanthephyra sp. (31%), other unidentified Caridea (15%), and unidentified teleosts (17%). A low significant difference in diet between sexes was found (R = 0.21, P < 0.01). The trophic position of R. velezi was 3.9 ± 0.7. This species displays bentopelagic feeding behavior and it is a secondary predator in northern Peru.

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Section: Study Area and Sampling Methodologyunclassified

Section: Introductionmentioning

confidence: 99%

Diet of the rasptail skate, Rostroraja velezi (Rajiformes: Rajidae), off Piura, Peru

Molina-Salgado¹,

Alfaro‐Shigueto²,

González-Pestana³

2021

Cienc. Mar.

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“…Orectolobiforms (TL = 3.6) and heterodontiforms (TL = 3.2) represent the main exceptions (second-level predators; see Cortés, 1999). Later, various authors expanded this estimate of the trophic level to various batoid groups (see Bizzarro, 2005;Ebert & Bizzarro, 2007;Belleggia et al, 2008;Woodland, Secor & Wedge, 2011;Jacobsen & Bennett, 2013;Coasaca-Céspedes et al, 2018;Rastgoo, Navarro & Valinassab, 2018;Yemışken et al, 2018). Batoids are mostly second-level predators, while the rare exceptions reaching a higher trophic level (TL > 4) manly belong to hypnids, gymnurids and torpedinids (see Bizzarro, 2005;Ebert & Bizzarro, 2007;Belleggia et al, 2008;Woodland, Secor & Wedge, 2011;Jacobsen & Bennett, 2013;Rastgoo, Navarro & Valinassab, 2018;Yemışken et al, 2018).…”

Section: Trophic Specializationmentioning

confidence: 99%

The Italian record of the Cretaceous shark,Ptychodus latissimusAgassiz, 1835 (Chondrichthyes; Elasmobranchii)

Amadori

Amalfitano

Giusberti

et al. 2020

PeerJ

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Associated and isolated teeth of the extinct elasmobranch Ptychodus latissimus Agassiz, 1835 from the Upper Cretaceous Scaglia Rossa pelagic limestone of northern Italy are described and discussed here in detail for the first time. The dentition of this widely distributed species consists of low-crowned molariform teeth that exhibit marked and strong occlusal ornamentations suitable for crushing hard-shelled prey. The associated tooth sets and isolated teeth analyzed here are heterogeneous in size and crown outline, but unambiguously belong to a single species. Re-examination of this Italian material consisting of ca. 30 specimens mostly coming from historical collections allows for a rigorous assessment of the intraspecific variability of P. latissimus, including the identification of three different tooth “morphotypes” based on their positions within the jaws. The relatively flat crowns and occlusal sharp and thick ridges indicate a high adaptation for crushing hard-shelled prey in P. latissimus indicating that the durophagous adaptations of this species were certainly more pronounced than in all other species of Ptychodus. We hypothesize that P. latissimus was a third-level predator occupying habitats with abundant thick-shelled prey, such as inoceramid bivalves and ammonites.

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“…Mobula munkiana feeds on zooplanktonic crustaceans with main food items varying both spatially and temporally (Coasaca-Céspedes et al, 2018;Notarbartolo di Sciara, 1988). For instance, M. munkiana feeds mainly on mysids that peak during Baja California Peninsula's cold upwelling season (Notarbartolo di Sciara, 1988) and in its absence on the euphausiid Nyctiphanes simplex (Coasaca-Céspedes et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

The devil is coming: Feeding behavior of juvenile Munk’s devil rays (Mobula munkiana) in very shallow waters of Punta Descartes, Costa Rica

et al. 2021

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Introduction: Identifying critical habitats for vulnerable elasmobranch species is crucial for effective conservation measures. The Munk’s devil ray (Mobula munkiana) is endemic to the Eastern Pacific, but yet little is known about its biology, ecology, and habitat use. As filter feeders, it is assumed that this species concentrates at high-productive upwelling regions, such as the Costa Rican Dome. Like many elasmobranchs, its populations are highly depleted and require urgent information to inform better conservation measures. Objective: The study was conducted to gain information on a unique behavior observed in juvenile M. munkiana, so further information can be provided on early life stages of this vulnerable species. Methods: From June to September 2017 and in August 2018, the feeding behavior of juvenile Mobula munkiana was observed in two shallow bays located at Punta Descartes, North Pacific Costa Rica. Individuals were captured using a non-lethal method to obtain data on size, weight, and sex distribution. Plankton samples (n = 100) were taken at both bays throughout the months to infer diet composition. Results: Munk’s devil rays showed a repetitive swimming movement parallel to the beach, feeding exclusively in the shallow breaking zone of the low tide waves at depth <50cm. A total of 12 M. munkiana (11 live and one found dead) indicated a juvenile feeding aggregation ranging from 490 – 610mm in disk width and 1400 – 2300gr in weight. The sex ratio (males to females) was 3:1. Zooplankton of the order Mysidacae was found in the highest abundance in the breaking zone. Conclusions: The specific behavior and seasonal occurrence of juvenile Munk’s devil rays in this area seem to be driven by prey abundance. More research is needed to conclude the presence of reproductive adults at deeper depths and the year-round habitat use of Punta Descartes. The area is threatened by unsustainable development and requires realistic management strategies to guarantee the survival of vulnerable species and their critical habitats.

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Preliminary analysis of the feeding habits of batoids from the genera <i>Mobula</i> and <i>Myliobatis</i> in Northern Peru

Cited by 10 publications

References 10 publications

Diet of the rasptail skate, Rostroraja velezi (Rajiformes: Rajidae), off Piura, Peru

Diet of the rasptail skate, Rostroraja velezi (Rajiformes: Rajidae), off Piura, Peru

The Italian record of the Cretaceous shark,Ptychodus latissimusAgassiz, 1835 (Chondrichthyes; Elasmobranchii)

The devil is coming: Feeding behavior of juvenile Munk’s devil rays (Mobula munkiana) in very shallow waters of Punta Descartes, Costa Rica

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