First record of the deep-water shark Etmopterus spinax (Chondrichthyes: Etmopteridae) from the southern Baltic Sea (Pomeranian Bay)

Więcaszek, Beata; Sobecka, Ewa; Panicz, Remigiusz; Keszka, Sławomir; Górecka, Klaudia; Linowska, Angelika

doi:10.1016/j.oceano.2018.02.001

Cited by 4 publications

(7 citation statements)

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“…Compared to the present study, E. spinax in Angolan waters (Zaera, 2005) seems to have larger pre-narial length (PRN) and larger first dorsal fin in terms of height (D1H) and base length (D1B), while specimens off southern Portugal (Coelho & Erzini, 2008b) seem to have larger preorbital length (POB), smaller eye length (EYL) and smaller dorsal anterior margins of the first and second dorsal fins (D1A and D2A, respectively). Başusta (2016) recorded a smaller range in morphometric values as the sample included neonates only, while signs of differentiation are noticed with the single large specimen caught in the Baltic Sea (Więcaszek et al, 2018). E. spinax is a viviparous lecithotrophic species with females having two uteri and two functioning ovaries (Hamlett et al, 2005;Musick & Ellis, 2005).…”

Section: Discussionmentioning

confidence: 99%

“…(2009) studied the species' biology, and in the southern Baltic Sea, Więcaszek et al . (2018) described the first record of E. spinax .…”

Section: Introductionmentioning

confidence: 99%

“…Note: S.D. values are not available inCoelho and Erzini (2008b) andWięcaszek et al (2018).Abbreviations: F, female; M, male; N, number of individuals; S.D., standard deviation. * corresponds to the values (e.g.…”

mentioning

confidence: 99%

“…In the North Sea, studies have focused on some biological aspects, the abundance, distribution, diet and feeding ecology of the species (Bergstad et al, 2003;Daan et al, 2005;Ellis et al, 2004;Hickling, 1963). In the Azores Archipelago, Aranha et al (2009) studied the species' biology, and in the southern Baltic Sea, Więcaszek et al (2018) described the first record of E. spinax.…”

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confidence: 99%

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Shedding light on the deep: The case of the velvet belly lanternshark in the North Aegean Sea

Kousteni¹

2021

Journal of Fish Biology

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Main biological features were assessed for the first time in the deep-water shark Etmopterus spinax from Hellenic waters by examining 150 individuals caught incidentally in the bottom-trawl commercial fishery off Skyros island. Females outnumbered males and the overall sex ratio was 1.38:1. Females ranged from 122 to 311 mm in total length (L T ) and males from 129 to 270 mm L T , both exhibiting positive allometric growth. Total length-total mass relationships and frequency distributions did not show significant differences between females and males. Sexual dimorphism was not either found by analysing 56 different morphological characteristics. The effect of sex and season was more prominent on the gonadosomatic and hepatosomatic indices compared to the relative condition factor. Most of the individuals were sexually immature, with two specimens classified as mature, one gravid female reaching 311 mm L T with undeveloped gonads and enlarged uteri with embryos, and one male reaching 270 mm L T with enlarged gonads and rigid claspers with hooks. The present study highlights the importance of the sampling location as a breeding and nursery ground for E. spinax in the eastern Mediterranean Sea that should be taken into account for the species' conservation considering its intrinsic characteristics, which make it vulnerable to fishing pressure.

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Section: Discussionmentioning

confidence: 99%

“…(2009) studied the species' biology, and in the southern Baltic Sea, Więcaszek et al . (2018) described the first record of E. spinax .…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Shedding light on the deep: The case of the velvet belly lanternshark in the North Aegean Sea

Kousteni¹

2021

Journal of Fish Biology

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“…In addition to swordfish, other fish species unusual for the Baltic Sea have also been observed, such as the ocean sunfish, Mola mola (Linnaeus, 1758) (see Grygiel 2010), as well as sharks, e.g. porbeagle, Lamna nasus (Bonnaterre, 1788), piked dogfish, Squalus acanthias Linnaeus, 1758 and lesser spotted dogfish, Scyliorhinus canicula (Linnaeus, 1758), velvet belly lanternshark, Etmopterus spinax (Linnaeus, 1758) (see Zidowitz et al 2008;Więcaszek et al 2018).…”

Section: Figurementioning

confidence: 99%

Philichthys xiphiae (Copepoda; Philichthyidae) – an interesting cranium parasite of the swordfish Xiphias gladius collected from the Baltic Sea

Rolbiecki

Arciszewski

Izdebska

2021

Oceanological and Hydrobiological Studies

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The swordfish, Xiphias gladius Linnaeus, 1758, is a fish that sporadically enters the Baltic Sea. The present paper describes the identification of a very rarely recorded and poorly studied copepod of the family Philichthyidae – Philichthys xiphiae Steenstrup, 1862 – in a dead swordfish found on a sea beach in Dźwirzyno (Poland) in 2016. Philichthyidae are parasites inhabiting the sensory canals in the lateral line and skull bones of marine fish. In the present case, two P. xiphiae females were found, which constitutes the first record of the species in the Baltic area.

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Diphyllobothrium sp. and Other Parasites of Migrating and Rare Fish Species in the Southern Baltic Sea and Coastal Waters, Poland

Rząd,

Więcaszek,

Linowska

et al. 2024

Animals

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The present study is the first to analyse the parasite fauna of sole Solea solea, dab Limanda limanda, hake Merluccius merluccius, whiting Merlangius merlangus, and plaice Pleuronectes platessa in the Pomeranian Bay, as well as saithe Pollachius virens from the Szczecin Lagoon (Poland). The aim of this study was to determine the occurrence of parasites in migrating and rare fish in the Pomeranian Bay and the Szczecin Lagoon and to determine the composition of the diet of these fish. The fish for analysis were obtained in the years 2010–2019. The typical marine nematode Capillaria (Procapillaria) gracilis, rarely recorded in Poland, was found, in addition to the following parasites: Ichthyophonus hoferi, Trichodina jadranica, Diphyllobothrium sp., Dichelyne (Cucullanellus) minutus, Raphidascaris acus, Anisakis simplex, Contracaecum osculatum, Hysterothylacium aduncum, Pseudoterranova decipiens, and Echinorhynchus gadi. Because the fish species analysed in the study are not typically present in the Baltic (with the exception of plaice), and because we do not know how long they feed while they are in the Baltic, we cannot be certain which parasites they acquired in the water bodies analysed in the study and which were introduced during the migration of fish. Although these fish are outside of their normal geographic range (except for plaice), in the new environment, there were enough suitable intermediate hosts for the parasites of these fish to complete their life cycle and survive.

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First record of the deep-water shark Etmopterus spinax (Chondrichthyes: Etmopteridae) from the southern Baltic Sea (Pomeranian Bay)

Cited by 4 publications

References 15 publications

Shedding light on the deep: The case of the velvet belly lanternshark in the North Aegean Sea

Shedding light on the deep: The case of the velvet belly lanternshark in the North Aegean Sea

Philichthys xiphiae (Copepoda; Philichthyidae) – an interesting cranium parasite of the swordfish Xiphias gladius collected from the Baltic Sea

Diphyllobothrium sp. and Other Parasites of Migrating and Rare Fish Species in the Southern Baltic Sea and Coastal Waters, Poland

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