Invasive Callinectes sapidus and Portunus segnis in Libyan waters
Corsini-Foka et al. (2021), BioInvasions Records 10(4): 885–893, https://doi.org/10.3391/bir.2021.10.4.13
887
Figure 1. Locations of both published and unpublished Callinectes sapidus and Portunus segnis
records along the Libyan coast ([1] Shakman et al. 2017, [2] Shakman et al. 2019).
Results
A first specimen of C. sapidus (specimen A) was collected on September
13
th
2020 by a professional fisher using the trammel net, at the UmmHufayn Lagoon, east coast of Libya (32°33′42.1″N; 23°05′27.6″E) (Figure 1),
at 1.25 m of depth on a prevalently sandy-muddy substrate. The specimen
A (Figure 2A) was a male, carapace width 20.5 cm, carapace length 8.5 cm.
The sample was deposited at the private collection of one of the authors
(SAM). A second specimen of C. sapidus (specimen B) was an immature
female (Figure 2B), collected on March 3
rd
2021 at 1.5 m depth, using the
same fishing technique at the same location. The sample was not retained.
The Umm-Hufayn Lagoon is a coastal location described in a number of
previous studies, including those by Badalamenti et al. (2011), Abdalhamid
et al. (2017) and Abdulrraziq et al. (2021) (Figure 3).
A total of 22 specimens of P. segnis (Figure 4) were collected during the
2018–2020 period through the use of a trammel net or during SCUBA
diving, from five locations sited along the western coast of Libya. More
specifically, they were captured along the coastal swathe stretching for 180
km in total, from the border with Tunisia to the west and the city of Tripoli
to the east, at depths ranging between 1 m and 10 m, prevalently over sandy
grounds (Figure 1; Table 1). The coastal area where P. segnis was found,
along with the entire western coastal region of Libya, is characterized by a
wide continental shelf; most of the same coast is rocky, interspersed with
occasional sandy areas (Shakman 2017). The western region of Libya
supports a high degree of productivity as reflected in fisheries landings, but
it is also vulnerable to pollution and other anthropogenic stressors to the
Corsini-Foka et al. (2021), BioInvasions Records 10(4): 885–893, https://doi.org/10.3391/bir.2021.10.4.13
887
Figure 1. Locations of both published and unpublished Callinectes sapidus and Portunus segnis
records along the Libyan coast ([1] Shakman et al. 2017, [2] Shakman et al. 2019).
Results
A first specimen of C. sapidus (specimen A) was collected on September
13
th
2020 by a professional fisher using the trammel net, at the UmmHufayn Lagoon, east coast of Libya (32°33′42.1″N; 23°05′27.6″E) (Figure 1),
at 1.25 m of depth on a prevalently sandy-muddy substrate. The specimen
A (Figure 2A) was a male, carapace width 20.5 cm, carapace length 8.5 cm.
The sample was deposited at the private collection of one of the authors
(SAM). A second specimen of C. sapidus (specimen B) was an immature
female (Figure 2B), collected on March 3
rd
2021 at 1.5 m depth, using the
same fishing technique at the same location. The sample was not retained.
The Umm-Hufayn Lagoon is a coastal location described in a number of
previous studies, including those by Badalamenti et al. (2011), Abdalhamid
et al. (2017) and Abdulrraziq et al. (2021) (Figure 3).
A total of 22 specimens of P. segnis (Figure 4) were collected during the
2018–2020 period through the use of a trammel net or during SCUBA
diving, from five locations sited along the western coast of Libya. More
specifically, they were captured along the coastal swathe stretching for 180
km in total, from the border with Tunisia to the west and the city of Tripoli
to the east, at depths ranging between 1 m and 10 m, prevalently over sandy
grounds (Figure 1; Table 1). The coastal area where P. segnis was found,
along with the entire western coastal region of Libya, is characterized by a
wide continental shelf; most of the same coast is rocky, interspersed with
occasional sandy areas (Shakman 2017). The western region of Libya
supports a high degree of productivity as reflected in fisheries landings, but
it is also vulnerable to pollution and other anthropogenic stressors to the