WITHDRAWN: Histological and ultrastructural characteristics of the testis of the invasive suckermouth sailfin catfish Pterygoplichthys disjunctivus (Siluriformes: Loricariidae) from Marikina River, Philippines

Jumawan, Joycelyn C.; Herrera, Annabelle A.

doi:10.1016/j.tice.2014.05.001

“…Additionally, both the fingerling and large-size catfish were significantly impactful in terms of reducing feeding durations of rohu fingerlings. This is highly concerning in the field of invasion ecology and fisheries sciences, as Amazon sailfin catfish species has now spread in several Asian (Bijukumar et al, 2015; Parvez et al, 2023) and Southeast Asian countries (Jumawan et al, 2011; Chaichana et al, 2011), where Rohu is an important economically valuable, native species (Rasal and Sundaray, 2020; Modeel et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

“…In this paper, we aim to understand competitive interactions in the context of feeding between two freshwater fish species, the Amazon sailfin catfish and rohu, that have been reported to co-occur in different countries across Asia. The Amazon sailfin catfish is native to the Amazon basin, and has been tagged as one of the invasive species in several countries, Mexico (Wakida-Kusunoki et al, 2007), Florida (Ludlow and Walsh, 1991), Texas (Edward, 2001), Malaysia (Saba et al, 2020), Iraq (Qasim and Jawad, 2022), Vietnam (Levin et al, 2008), Philippines (Jumawan et al, 2011), Sri Lanka (Herath et al, 2020), Italy (Piria et al, 2018), Bangladesh (Hossain et al, 2018), and the Indian freshwaters (Bijukumar et al, 2015; Rao and Sunchu, 2017; Hussan et al, 2019; Das et al, 2020; Seshagiri et al, 2021, Mallick et al, 2023). Amazon sailfin catfish is a benthic forager with hard armor and spines, belonging to the Loriicariidae family of catfish, which are considered to be aggressive and territorial (Hossain et al, 2018; Umar and Ramayani, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Understanding feeding competition under laboratory conditions: Rohu (Labeo rohita)versus Amazon sailfin catfish (Pterygoplichthysspp.)

Mallick,

Sundaray,

Ghosal

2024

Preprint

0

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Competitive interactions between species is widely prevalent within the animal world. In this manuscript, we attempted to understand feeding competitions between the Amazon sailfin catfish, an invasive species introduced globally, and rohu, a keystone species native to several countries within southeast Asia. We used two different size classes of each species, large-size having total length (TL, from snout tip to caudal fin) of 15-20 cm and fingerling having TL <6 cm, and feeding duration was used as a proxy to understand competition. Our results demonstrated that feeding durations of large-size rohu were either similar or significantly (P<0.05) higher in presence of catfish when compared to trials in presence of conspecifics, indicating that large-size rohu is not a weak competitor. However, feeding durations of fingerling rohu was significantly (P<0.05) reduced in presence of both large-size and fingerling catfish, when compared to trials in presence of conspecifics. Moreover, fingerling rohu also displayed freeze (alarm) behavior in presence of the catfish. Interestingly, presence of rohu had no significant (P>0.05) impact on feeding durations of catfish. Overall, the study demonstrated that invasive catfish may behaviorally outcompete fingerling rohu, thus, threatening the sustenance of a species that is native to several freshwaters around the globe.

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Reproductive Phenology and Size Structure Characteristics of <i>Hypseleotris agilis</i> (Herre, 1927) in Lake Mainit, Philippines

Jumawan

¹

,

Hidalgo

²

,

Seronay

³

2020

ILNS

1

0

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Hypseleotris agilis locally known as Bugwan is a native species and one of the most abundant fishes of commercial value in Lake Mainit, Philippines. A total of 1,584 H. agilis from Lake Mainit near the mouth of Kalinawan and Puyo River were caught from May 2018 to February 2019 to determine the length-weight relationship (LWR), condition factor (K), gonadosomatic index (GSI) and hepatosomatic index (HSI) of this species. Positive allometric growth was observed for both sexes (b>3). Sex ratio indicated the dominance of males over females as much as 58.7%. The number of ripe males and gravid females was observed throughout the months of the collection, which indicates the ability of the fish species to spawn continuously throughout the year. Determination of GSI in both sexes showed higher values during November (males) and December (females). However, HSI values were relatively low during the spawning season, which would indicate the usage of energy for gonadal maturation. The K factor showed high values during the peak spawning months, directly proportional to GSI values. This study provides updated information for management and conservation of this important fishery resource in Lake Mainit.

show abstract

Reproductive Phenology and Size Structure Characteristics of <i>Hypseleotris agilis</i> (Herre, 1927) in Lake Mainit, Philippines

Jumawan

¹

,

Hidalgo

²

,

Seronay

³

2020

ILNS

0

View full text Add to dashboard Cite

Hypseleotris agilis locally known as Bugwan is a native species and one of the most abundant fishes of commercial value in Lake Mainit, Philippines. A total of 1,584 H. agilis from Lake Mainit near the mouth of Kalinawan and Puyo River were caught from May 2018 to February 2019 to determine the length-weight relationship (LWR), condition factor (K), gonadosomatic index (GSI) and hepatosomatic index (HSI) of this species. Positive allometric growth was observed for both sexes (b>3). Sex ratio indicated the dominance of males over females as much as 58.7%. The number of ripe males and gravid females was observed throughout the months of the collection, which indicates the ability of the fish species to spawn continuously throughout the year. Determination of GSI in both sexes showed higher values during November (males) and December (females). However, HSI values were relatively low during the spawning season, which would indicate the usage of energy for gonadal maturation. The K factor showed high values during the peak spawning months, directly proportional to GSI values. This study provides updated information for management and conservation of this important fishery resource in Lake Mainit.

show abstract

WITHDRAWN: Histological and ultrastructural characteristics of the testis of the invasive suckermouth sailfin catfish Pterygoplichthys disjunctivus (Siluriformes: Loricariidae) from Marikina River, Philippines

Cited by 3 publications

References 10 publications

Understanding feeding competition under laboratory conditions: Rohu (Labeo rohita)versus Amazon sailfin catfish (Pterygoplichthysspp.)

Understanding feeding competition under laboratory conditions: Rohu (Labeo rohita)versus Amazon sailfin catfish (Pterygoplichthysspp.)

Reproductive Phenology and Size Structure Characteristics of <i>Hypseleotris agilis</i> (Herre, 1927) in Lake Mainit, Philippines

Reproductive Phenology and Size Structure Characteristics of <i>Hypseleotris agilis</i> (Herre, 1927) in Lake Mainit, Philippines

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